Substring query question
How can I improve this query to only insert the first 40 chars. Table1, column1 type is VARCHAR2(100), but I just need up to 40 chars.
INSERT /*+ append */ INTO Table2 (column1) SELECT (column1) FROM (table1);
COMMIT;
Well really wat I want to do is extract the first word from a column that is less then 40chars, otherwise extract the first 40 chars. And I want to do this to thousands of records, inserting them into a new table.
Similar Messages
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Simple Query Question - How do I return the Last 3 records of a Table?
Question.
For example, I have a table that has 50 records.
How do I, specify in SQL to only return the last 3 records of the table.
Select a.* from table a where ????I was just trying to show an example to a friend on
how something like this would work and if it was even possible. But it won't work. Here's a simple example:
SQL> create table emp
2 (id)
3 as
4 select object_id
5 from all_objects
6 order by object_id;
Table created.
SQL> select *
2 from (select rownum rn
3 ,b.*
4 from emp b)
5 where rn > ( select (max(rownum) - 3)
6 from emp)
7 ;
RN ID
40830 55891
40831 55892
40832 55893So far, so good. These are the "last 3" rows inserted. Now delete a bunch of rows and insert 3 new ones:
SQL> delete emp where id < 40000;
33423 rows deleted.
SQL> commit;
Commit complete.
SQL> insert into emp values (60000);
1 row created.
SQL> insert into emp values (60001);
1 row created.
SQL> insert into emp values (60002);
1 row created.
SQL> commit;
Commit complete.
SQL> select *
2 from (select rownum rn
3 ,b.*
4 from emp b)
5 where rn > ( select (max(rownum) - 3)
6 from emp)
7 ;
RN ID
7410 55891
7411 55892
7412 55893Here's the problem. Even though the "last 3 rows" are 60000 - 60002, I still get the same ones as the first query. -
Can someone please help me with a sub query question?
I need to list a 3rd party contract and then a list of students who belong to that contract.
On the students segment of the listing I need to show students with student id, name, total credit hours,
total amount spent on tuition, total amount spent on books and total amount spent on misc.
This code has a query for the contract information and I get that just fine.
Then it has a query that gives me total credit hours and that works fine
then it has a query that gives me total amount spent on tuition and that works fine
but
when I add the next query to get total amount spent on books I get only the information for the contract, I don't get student stuff anymore.
I would really appreciate any guidance that you could give.
Thanks in advance, Bob Hohulski
DECLARE
l_conn utl_TCP.connection;
v_filehandle utl_file.file_type;
v_output varchar2(1000);
v_contract_id varchar2(9);
v_contract_addr1 varchar2(30);
v_contract_addr2 varchar2(30);
v_contract_city varchar2(20);
v_contract_stat varchar2(03);
v_contract_zip varchar2(10);
v_contract_name varchar2(60);
v_student_id varchar2(09);
v_student_first_name varchar2(15);
v_student_mid_name varchar2(15);
v_student_last_name varchar2(60);
v_last_out varchar2(20);
v_student_detail_code varchar2(04);
v_student_amount number(12,2);
v_student_ref_number varchar2(09);
v_credit_hrs number(7,2);
v_tuition_amount number(12,2);
v_books_amount number(12,2);
v_misc_amount number(12,2);
v_total_for_student number(12,2);
v_current_student varchar2(09);
v_sftregs_pidm varchar2(09);
v_tbraccd_pidm varchar2(09);
CURSOR c_sel_contract IS
SELECT DISTINCT spriden_id, spriden_last_name,
spraddr_street_line1, spraddr_street_line2,
spraddr_city, spraddr_stat_code, spraddr_zip
FROM spriden, spraddr
-- WHERE spriden_id = '&Enter_Id'
where spriden_id = 'T10474666'
AND spriden_pidm = spraddr_pidm
AND SPRIDEN_CHANGE_IND IS NULL;
CURSOR c_sel_student IS
SELECT DISTINCT spriden_id, spriden_first_name, spriden_mi, spriden_last_name,
sftregs_credit_hr,
tbraccd_amount,
sftregs_pidm,
tbraccd_pidm
FROM spriden, tbraccd, tbbcstu, sftregs
WHERE 559220 = tbbcstu_contract_pidm
AND spriden_pidm = tbraccd_pidm
AND spriden_pidm = tbbcstu_stu_pidm
AND spriden_pidm = sftregs_pidm
AND (sftregs_pidm, sftregs_credit_hr) IN
(SELECT DISTINCT sftregs_pidm, SUM(sftregs_credit_hr)
FROM sftregs, tbbcstu, spriden
WHERE sftregs_term_code = '201010'
AND sftregs_pidm = tbbcstu_stu_pidm
AND sftregs_pidm = spriden_pidm
GROUP BY sftregs_pidm)
AND (tbraccd_pidm, tbraccd_amount) IN
(SELECT DISTINCT tbraccd_pidm, SUM(tbraccd_amount)
-- tuition
FROM tbraccd, tbbcstu, spriden
WHERE tbraccd_term_code = '201010'
AND (tbraccd_detail_code = 'TU01' OR
tbraccd_detail_code = 'TU02' OR
tbraccd_detail_code = 'TU03' OR
tbraccd_detail_code = 'TU04')
AND tbraccd_pidm = tbbcstu_stu_pidm
AND tbraccd_pidm = spriden_pidm
GROUP BY tbraccd_pidm)
--this code works up to this point
--when I add the next query I get nothing
AND (tbraccd_pidm, tbraccd_amount) IN
(SELECT tbraccd_pidm, SUM(tbraccd_amount)
books
FROM tbraccd, tbbcstu
WHERE tbraccd_term_code = '201010'
AND (tbraccd_detail_code = 'BKSU' OR
tbraccd_detail_code = 'BKCH')
AND tbraccd_pidm = tbbcstu_stu_pidm
GROUP BY tbraccd_pidm, tbraccd_amount)
--AND (tbraccd_pidm, tbraccd_amount) IN
-- (SELECT tbraccd_pidm, SUM(tbraccd_amount)
-- misc
-- FROM tbraccd, tbbcstu
-- WHERE tbraccd_term_code = '201010'
-- AND tbraccd_pidm = tbbcstu_stu_pidm
-- AND (tbraccd_detail_code = 'AUNA' OR
-- tbraccd_detail_code = 'OTPB')
-- GROUP BY tbraccd_pidm, tbraccd_amount)
--ORDER BY tbraccd_pidm, spriden_first_name, spriden_mi, spriden_last_name,
-- tbbcstu_sponsor_ref_number, sftregs_credit_hr;
ORDER BY tbraccd_pidm;
BEGIN
v_filehandle := utl_file.fopen(location => 'UTLFILE_MISAP9',
filename => 'ban_matrix.dat',
open_mode => 'w',
max_linesize => 32767);
OPEN c_sel_contract;
LOOP
DBMS_OUTPUT.PUT_LINE('looping');
FETCH c_sel_contract INTO v_contract_id, v_contract_name,
v_contract_addr1, v_contract_addr2,
v_contract_city, v_contract_stat,
v_contract_zip;
EXIT WHEN c_sel_contract%NOTFOUND;
v_output :=
nvl(rpad(v_contract_id,9),rpad(' ',9)) ||
' ' ||
nvl(rpad(v_contract_name,60),rpad(' ',60));
utl_file.put_line(v_filehandle,v_output);
v_output :=
nvl(rpad(v_contract_addr1, 30),rpad(' ',30)) ||
' ' ||
nvl(rpad(v_contract_addr2, 30),rpad(' ',30));
utl_file.put_line(v_filehandle,v_output);
v_output :=
nvl(rpad(v_contract_city, 20), rpad(' ',20)) ||
' ' ||
nvl(rpad(v_contract_stat, 3), rpad(' ',3)) ||
' ' ||
nvl(rpad(v_contract_zip, 10), rpad(' ',10));
utl_file.put_line(v_filehandle,v_output);
utl_file.new_line(v_filehandle);
OPEN c_sel_student;
LOOP
FETCH c_sel_student into v_student_id, v_student_first_name, v_student_mid_name,
v_student_last_name,
v_credit_hrs,
v_tuition_amount,
v_sftregs_pidm,
v_tbraccd_pidm;
-- v_books_amount, v_misc_amount;
EXIT WHEN c_sel_student%NOTFOUND;
v_last_out := substr(v_student_last_name, 1, 20);
v_output :=
nvl(rpad(v_student_id, 09),rpad(' ',09)) ||
' ' ||
nvl(rpad(v_student_first_name, 15),rpad(' ',15)) ||
nvl(rpad(v_student_mid_name, 15),rpad(' ',15)) ||
nvl(rpad(v_last_out, 20),rpad(' ',20)) ||
' ' ||
nvl(rpad(v_student_ref_number, 09),rpad(' ',09)) ||
' ' ||
v_credit_hrs ||
' ' ||
v_tuition_amount ||
-- v_books_amount ||
-- ' ' ||
-- v_misc_amount;
utl_file.put_line(v_filehandle,v_output);
END LOOP;
END LOOP;
--EXCEPTION
--WHEN OTHERS THEN
-- DECLARE
-- err_msg VARCHAR2(100);
-- BEGIN
-- err_msg := 'ERR- '||SUBSTR(SQLERRM, 1,100);
-- - utl_file.put_line(v_filehandle,err_msg);
--END;
utl_file.fclose(v_filehandle);
CLOSE c_sel_contract;
CLOSE c_sel_student;
--END AR_MATRIX_PROC;
END;run this original query
SELECT DISTINCT spriden_id,
spriden_first_name,
spriden_mi,
spriden_last_name,
sftregs_credit_hr,
tbraccd_amount,
sftregs_pidm,
tbraccd_pidm
FROM spriden, tbraccd, tbbcstu, sftregs
WHERE 559220 = tbbcstu_contract_pidm
AND spriden_pidm = tbraccd_pidm
AND spriden_pidm = tbbcstu_stu_pidm
AND spriden_pidm = sftregs_pidm
AND (sftregs_pidm, sftregs_credit_hr) IN (SELECT DISTINCT sftregs_pidm, SUM(sftregs_credit_hr)
FROM sftregs, tbbcstu, spriden
WHERE sftregs_term_code = '201010'
AND sftregs_pidm = tbbcstu_stu_pidm
AND sftregs_pidm = spriden_pidm
GROUP BY sftregs_pidm)
AND (tbraccd_pidm, tbraccd_amount) IN (SELECT DISTINCT tbraccd_pidm, SUM(tbraccd_amount)
-- tuition
FROM tbraccd, tbbcstu, spriden
WHERE tbraccd_term_code = '201010'
AND (tbraccd_detail_code = 'TU01' OR
tbraccd_detail_code = 'TU02' OR
tbraccd_detail_code = 'TU03' OR
tbraccd_detail_code = 'TU04')
AND tbraccd_pidm = tbbcstu_stu_pidm
AND tbraccd_pidm = spriden_pidm
GROUP BY tbraccd_pidm)
AND (tbraccd_pidm, tbraccd_amount) IN (SELECT tbraccd_pidm, SUM(tbraccd_amount) books
FROM tbraccd, tbbcstu
WHERE tbraccd_term_code = '201010'
AND (tbraccd_detail_code = 'BKSU' OR
tbraccd_detail_code = 'BKCH')
AND tbraccd_pidm = tbbcstu_stu_pidm
GROUP BY tbraccd_pidm, tbraccd_amount)
ORDER BY tbraccd_pidm;then run this sub-query:
SELECT tbraccd_pidm, SUM(tbraccd_amount) books
FROM tbraccd, tbbcstu
WHERE tbraccd_term_code = '201010'
AND (tbraccd_detail_code = 'BKSU' OR
tbraccd_detail_code = 'BKCH')
AND tbraccd_pidm = tbbcstu_stu_pidm
GROUP BY tbraccd_pidm, tbraccd_amount)see if you have a matching tbraccd_pidm and tbraccd_amount between the two results. -
Leading zeroes substring query in SQL Server
Can Someone please help me in padding leading zeroes for the months in End date
Example: actual data is like 6222007
,11301998 in end date column the following query works fine for 11301998 and converts it as 19981130 which was correct.
But 6222007
fails because month has no leading zero and it converts it as 0076222 which is wrong.
How can i make it as 20070622 with the following code
select (case when replace (ltrim(rtrim(ltrim([end date]))), '|', '') in ('99999999','00000000') then NULL
else substring ([END DATE],5,4)+SUBSTRING([END DATE],1,2)+SUBSTRING([END DATE],3,2) end) as ConvEnd_date
from AdventureWorks.dbo.[AccountTable]Something like:
declare @i int = 6222007
select @i%10000 year_number, @i/1000000 month_number, (@i/10000)%100 day_number
select DATEFROMPARTS(@i%10000,@i/1000000,(@i/10000)%100)
David
David http://blogs.msdn.com/b/dbrowne/ -
Oracle 10g and parallel query question
Hi Oracle on SAP Gurus!
We are currently thinking of activating parallel query for certain segments (large application tables and indexes). We searched in SAPNet and SDN and have also studied the SAP Note 651060. But we did not find a complete answer to the following question which is very important for us:
Which kinds of queries (despite from full table scan and index scan in partitioned indexes) support parallel queries and which ones do not support parallel queries?
This is important for us to find out whether we have candidates for parallel queries or not.
Thanx for any hint!
Regards,
VolkerBut why do you not propose to use parallel query in OLTP systems?
If the queries are accessed very frequently you will just run out of cpu and io ressources. OLTP systems are (historical) typically multi user systems. You can off course use PQ for 'single user' activities, like index rebuilds, some batchjobs, but you shouldn't do for frequent user queries.
If you have time look at this interesting Article [Suck It Dry - Tuning Parallel Execution|http://doug.burns.tripod.com/px.html]
It is quite old, and you don't have to read all tech details, but i recommend having a look at the conclusions at the end.
May it make sense to use partitioning of these tables in conjunction with parallel query?
I know some guys, who do partitioning on OLTP systems, even SAP systems. But they don't use PQ then. The use partitioning to work on a smaller set of data. In your case the range scans, would need to scan only one partition, saving buffer cache and effectively speeding up execution. So you don't need PQ to scan all partitions at all, this would be a typical OLAP approach.
Best regards
Michael -
Hi ,
i have the original query as
SELECT * FROM View1 A , View2 B
WHERE A.ITEM_ID = B.ITEM_ID(+)
values for ITEM_ID is ABC.01
ABC.02 ... 99
values for ITEM_NAME is ABC
however, when i changed it to
SELECT * FROM View1 A , View2 B
WHERE SUBSTR(A.ITEM_ID ,1 ,INSTR(A.ITEM_ID) - 1) =
SUBSTR(b.ITEM_ID ,1 ,INSTR(b.ITEM_ID) - 1)(+)
It does not work
how is it possible to use the substr together with the outer join clause besides , putting the ITEM_NAME as part of the source view ?
please advise
tks & rgdsHi ,
This is my sample data
View 1 View 2
Item_id Item_id
Item Dec Item Dec
View1 View2
AAA.01 AAA.01
BBB.01 CCC.02
CCC.01
i just simply want to link view1 to view2 via Item_id , however ,as the version
in this case view1 is CCC.01 but view2 is CCC.02 , i would still want the data from view1 to be shown
It is this reason that i am using substr but the system is complaining that i cannot use (+)
I do know that if i simply add in the item name (i.e w/o the version) at view1 & view2 , then i do not need to use the substr but still i would like to know if i am using the substr , how may i use it together with the (+) operator if it's possible.
appreciate your advise
tks & rgds -
Hello world,
I'm new to JPA 2.0 and there are few things I don't understand.
BTW: I can't figure out the keywords to search for this question, so please pardon me if it's one of the most asked.
Using the Preview, I've seen that alignment went straight to Hell, so I tried to make this as readable as I could using pipes in place of white spaces in the result sets.
I have a couple of tables:
CUST table (for customers):
CUST_ID (pk, integer)
CUST_NAME (varchar)
ORD table (for orders):
ORD_ID (pk, integer)
ORD_STATUS (char) can be: N for new, S for shipped, D for delivered
CUST_ID (fk, integer)
The relationship is, of course, a "one to many" (every customer can place many orders).
Content of the tables:
CUST_ID|CUST_NAME
1|elcaro
2|tfosorcim
3|elppa
ORD_ID|ORD_STATUS|CUST_ID
2|N|1
3|N|1
4|N|1
5|S|1
6|S|1
7|D|1
8|D|1
9|D|1
10|D|2
11|N|2
12|S|3
13|S|3
Here's how I annotated my classes:
Customer.java:
@Entity(name = "Customer")
@Table(name = "CUST")
public class Customer implements Serializable
private static final long serialVersionUID = 1L;
@Id
@Column(name = "CUST_ID")
private Integer id;
@Column(name = "CUST_NAME")
private String name;
@OneToMany(mappedBy = "customer")
private List<Order> orders;
// Default constructor, getters and setters (no annotations on these)
Order.java:
@Entity(name = "Order")
@Table(name = "ORD")
public class Order implements Serializable
private static final long serialVersionUID = 1L;
@Id
@Column(name = "ORD_ID")
private Integer id;
@Column(name = "ORD_STATUS")
private Character status;
@ManyToOne
@JoinColumns
@JoinColumn(name = "CUST_ID", referencedColumnName = "CUST_ID")
private Customer customer;
// Default constructor, getters and setters (no annotations on these)
Everything works just fine, the following JPQL query yields the results I expected:
select c from Customer c
it returns three objects of type Customer, each of which contains the orders that belong to that customer.
But now, I want to extract the list of customers that have orders in status 'N', along with the associated orders (only the status 'N' orders, of course).
Back in the good ol' days I would have written an SQL query like this:
select c.cust_id, c.cust_name, o.ord_id, o.ord_status
from cust c
inner join ord o on (o.cust_id = c.cust_id)
where o.ord_status = 'N'
and it would have returned the following result set:
CUST_ID|CUST_NAME|ORD_ID|ORD_STATUS
1|elcaro|2|N
1|elcaro|3|N
1|elcaro|4|N
2|tfosorcim|11|N
The following JPQL query, however, doesn't yield the expected results:
select distinct c from Customer c join c.orders o where o.status = 'N'
it returns the correct set of customers (customer 'elppa' doesn't have any status 'N' order and is correctly excluded), but each customer contains the full set of orders, regardless of the status.
It seems that the 'where' clause is only evaluated to determine which set of customers has to be extracted and then the persistence provider starts to navigate the relationship to extract the full set of orders.
Thinking a little about it, I must admit that it makes sense.
I then tried out another JPQL query:
select c, o from Customer c join c.orders o where o.status = 'N'
this JPA query yields results that are similar to the ones produced by the previous SQL query: each result (4 results as expected) is a 2-object array, the first object is of type Customer and the second object is of type Order. But, again, the objects of type Customer contain the full set of related orders (as I expected, this time). Not to mention the fact that now the orders are not contained in the Customer objects, but are returned separately, just as in an SQL result set.
Now the question is:
Is it possible to write a JPA query that filters out, not only the customers that don't have an order in status 'N', but the related orders (fetched during relationship navigation) that are not in status 'N' as well?
What I'd like to be able to get is a 2-customer result where each customer contains only its status 'N' orders.
I read the Java EE 6 Tutorial and one of the examples (the Order Application) has a schema that is similar to mine, but I couldn't find a query like this (in the downloaded source code).
Although I think the above is standard behavior, I use an Oracle Weblogic 12c server (through its Eclipse adapter) and the persistence provider appears to be EclipseLink.
Thanks in advance.
Best regards,
Stefano
Edited by: user11265230 on 17-apr-2012 14.11Hello,
When returning an entity from JPQL, it gives you the entity as it is in the database. Your "select distinct c from Customer c join c.orders o where o.status = 'N'" is asking for all customers that have an order with a status of 'N', so that is what it gives you. There is no condition to filter anything on the relationship when building the Customer object in JPA - doing so would mean returning a managed entity that does not reflect what is in the database. This would affect other queries, since JPA requires that queries return the same instance of an entity regardless of the query that is used to bring it back. So a query using your "where o.status = 'N'" would cause conflicting results when used with a query using "where o.status = 'Y'". And these queries would make the EntityManager unable to determine what has changed on the returned objects.
EclipseLink does have the ability to filter over relationships, it is just not available through standard JPA and I would strongly discourage it. Instead of querying for Customers, why not change the query to get Orders instead -
"select o from Customer c join c.orders o where o.status = 'N'". Assuming Orders have a ManyToOne back reference to their Customer, this will mean you do not need to travers the Customer-> order relationship. If using
"select c, o from Customer c join c.orders o where o.status = 'N'"
I am not sure why you would use the orders from the returned customers instead of the orders returned in the results though.
You could also return "select c.id, c.name, o.id, o.status from Customer c join c.orders o where o.status = 'N'" which is the equivalent of what you would get from the SQL you initially posted.
Regards,
Chris -
hi all,
i created a report that displays results based on this query initially.
select *
from EMP
where 1=1;
i'm using a SQL Query (PL/SQL Function Body Returning SQL Query).
i have search items in my page like empno, lastname, firstname, middle, email_address etc... when i place a value for lastname then in my query it should add AND LASTNAME = :P1_LASTNAME.
so the query returned should now have
select *
from EMP
where 1=1
and LASTNAME = :P1_LASTNAME;
is this possible?
i was thinking something like looping for all search items in the page (ie. text, popup lov, datetimepicker) then check whether the item is null or not... when not null then probably get the substring of the item name like (ie. substr(:P1_LASTNAME) and get only LASTNAME then add "=" then concat it with the item name. not sure if this is possible though.
thanks
allenhi denes,
thanks for the sample... i noticed that the sample hard codes additional conditions to be added to the sql query which is okay when the search criteria is less than 5-10... but i'm thinking if the search criteria will be like 15-30 fields or make all fields searchable, this might be uncomfortable.
what i was thinking is like loop thru all the items i.e.
declare
sql varchar2(4000) := 'select * from emp where 1=1';
begin
for i in (select * from all_items_in_apex) -- this is just an example.
loop
if i.value is not null then
sql := sql || ' and ' || i.column || '=' || i.value;
end if;
end loop;
end;
the only thing is that i don't know if there's a possible replacement for the clause (select * from all_items_in_apex).
sorry if i'm asking too much but this is how i normally do it in forms. the suggestion in the link you provided should be sufficient but i was just wondering if this idea is also possible.
thanks again.
allen -
Version 10.2.0.4.0
I have a question on the expected behavior of the query below.
When I run the query below with the constraint on t1.partid = 789, I get the query result t2.Indicator showing "SPECIAL" as expected.
However, if I remove the constraint, and return all orders and parts, for the "789" part, the Indicator column is null.
select t1.orderid, t1.partid, t2.Indicator
from Orders a left outer join
select partid, 'SPECIAL' as Indicator
from vendors
where vendorname like '%ABC%'
) t2
on t1.partid = t2.partid
where t1.partid = '789'
I can address the issue with a case statement (below) or likely restructuring into a better statement.
But I'm just curious if this is expected or if there is some SQL rule being violated in the first example.
I tried to search for this to see if it was already addressed but didn't have much luck.
This works:
select t1.orderid, t1.partid,
case when t1.partid is not null then "SPECIAL" else null end as Indicator
from Orders a left outer join
select partid, 'SPECIAL' as Indicator
from vendors
where vendorname like '%ABC%'
) t2
on t1.partid = t2.partidSorry, it's been a while since I posted and should have read the rules. And I didn't properly reference the alias. So Post #1 was bad.
When I mockup a small set of data (shown below), I don't get the error. The original query actually joins to a few other (seemingly) irrelevant tables and I tried to simplify it here So I guess if I can't replicate it, then there might not be much assistance that can be provided.
This was more of a curiousity than anything else to see if perhaps someone came across this before.
For what it's worth:
create table t1 (orderid number,
partid varchar2(20)
create table t2
(vendorid varchar2(20),
partid varchar2(20)
insert into t1 values(1, '123');
insert into t1 values(2, '456');
insert into t1 values(3, '789');
insert into t2 values ('ABC','789');
insert into t2 values ('DEF','123');
insert into t2 values ('EFG','456');
insert into t2 values ('ABC','7891');
insert into t2 values ('DEF','1231');
insert into t2 values ('EFG','4561');
select t1.orderid, t1.partid, t2.Indicator
from t1 left outer join
select partid, 'SPECIAL' as Indicator
from t2
where vendorid like '%ABC%'
) t2
on t1.partid = t2.partid
the query that gives unexpected behavior is (although I can't replicate on this simplified version):
select t1.orderid, t1.partid, t2.Indicator
from t1 left outer join
select partid, 'SPECIAL' as Indicator
from t2
where vendorid like '%ABC%'
) t2
on t1.partid = t2.partid -
Hi,
I am trying to filter my output from the query based on some conditions but not able to figure out how. May be I am just overlooking at the issue or is it something tricky.
So, I have a query returning 4 rows of output out of which I need to filter the rows. I have created a table from the result of the query that I need to filter to make it simple. So below is my create table script and values that are obtained from my original query.
CREATE TABLE TEMPACCT
SOURCEKEY NUMBER,
FLAG VARCHAR2(1),
ITEMID NUMBER(9) ,
ITEMNAME VARCHAR2(10) ,
ITEMKEY NUMBER(9)
Insert into tempacct values (0, 'N', 100, 'ITEM1' , 9647);
Insert into tempacct values (0, 'N', 200, 'ITEM2' , 9648);
Insert into tempacct values (9648, 'N', 100, 'ITEM3' , 9813);
Insert into tempacct values (9647, 'Y', 100, 'ITEM4' , 9812);
SQL> select * from tempacct;
SOURCEKEY F ITEMID ITEMNAME ITEMKEY
0 N 100 ITEM1 9647
0 N 200 ITEM2 9648
9648 N 100 ITEM3 9813
9647 Y 100 ITEM4 9812
SQL> Tempacct table is the table created from the resultset of my original query.
So from the above output, what I need is 3 rows. The logic to filter out the row is - If any of the row thathas sourcekey that is same as Itemkey in any of the 4 rows and flag is Y then remove the row which have flag =N and only display the one with Falg = Y.
Ok, so, in this case the desired output would be
SOURCEKEY F ITEMID ITEMNAME ITEMKEY
0 N 200 ITEM2 9648
9648 N 100 ITEM3 9813
9647 Y 100 ITEM4 9812So here we compared between the first row and the fourth row, and since the sourcekey in fourth row is same as itemkey in first row and Flag is 'Y' for fourth row, we keep 4th row and remove the first row since the flag is 'N'. (and sourcekey is 0. the row that gets removed will always have sourcekey =0) .
SQL> select * from v$version;
BANNER
Oracle Database 10g Release 10.2.0.4.0 - 64bit Production
PL/SQL Release 10.2.0.4.0 - Production
CORE 10.2.0.4.0 Production
TNS for Linux: Version 10.2.0.4.0 - Production
NLSRTL Version 10.2.0.4.0 - ProductionAppreciate your help.Hi,
ARIZ wrote:
Although the original question is already been answered, I had another small modification to the same question and also seeking some clarification. I do not want to open a new thread just for a similar question.I think you'll get better replies faster if you do start a new thread.
Not counting this one, there have been 13 replies to this thread. Not many people who havn't already been participating in this thread are going to start reading a thread with 13 replies. Those who do are going to waste a lot of time reading about issues that have already been resolved, and the are likely to understand the remaining issues incorrectly.
I have been following the thread from the beginnning, and I'm starting to get confused about what the unresolved issues are.
I believe there are two things you still need:
(1) An explanation of the solution I posted yesterday, involving the analytic COUNT function.
(2) A solution for a new problem involving the same tables
If I got that wrong, start a new thread, asking just what you need to know. Copy any relevant parts (like the CREATE TABLE and INSERT statements) from this thread. You can include a link to this thread, but do your best to make sure people don't have to use it.
I realize that's more work for you, but getting the best results, and getting them quickly, sometimes does require more work.
<h2>(1) An explanation of the solution I posted yesterday, involving the analytic COUNT function.</h2>
ARIZ wrote:
Hi Frank,
Just out of curiosity, I was trying to understand the Count analytical function that you have used in the solution.
COUNT ( CASE
WHEN ac.flag = 'Y'
THEN 1
END
) OVER ( PARTITION BY CASE
WHEN sourcekey = 0
THEN acctkey
ELSE sourcekey
END
) AS y_cntSo what I am thinking is, this would first partition the row with acctkey ( where sourcekey =0) and sourcekey and then within that partition, it will check whether ac.flag = Y or not, if it is 'Y' then it would return count as 1 else 0. Am I correct? In the mean time I am also reading the tutorials on Count() analytical query. I'm not sure I understand your explanation.
This is not partitioning first by x, and then by y. There is only one expression in the PARTITION BY clause. Most often, a PARTITION BY clause refers to some column in the table, for example:
SELECT ename
, job
, sal
, AVG (sal) OVER (PARTITION BY job) AS avg_sal_for_job
FROM scott.emp;This divides the result set into mutually exclusive parts; there will be as many such parts as there are distinct values for the PARTITION BY column. In the simple query above, if there happen to be 5 different values for job, you will get 5 independent averages.
In your problem, there is no one column that defines a partition. That is, these two rows belong to the same partition:
. SOURCEKEY F ACCTKEY
0 N 9647
9647 Y 9812even though none of the 3 columns are the same. We could create a view that had a single column, telling to which partition each row belonged, like this:
. SOURCEKEY F ACCTKEY PART_NUM
0 N 9648 9648
0 N 9647 9647
9648 N 9813 9648
9647 Y 9812 9647where part_num is the result of a CASE expression:
CASE
WHEN sourcekey = 0
THEN acctkey
ELSE sourcekey
ENDWe could then use that new column, part_num, in a (very simple) PARTITION BY clause. But there is no need to create a view, even an in-line view, for that: we can (and I did) use the CASE expression directly in a (not so simple) PARTITION BY clause.
Why did I use COUNT? The important thing about each partition is whether or not it includes any rows with flag='Y'. I don;t know of any function that directly answers that question. There are lots of ways to get the correct answer, but I think the one that corresponds most closely to the question we really want to ask:
"Do any rows have flag='Y'?" is
"How many rows have flag='Y'?"
The analytic function COUNT (x) returns a number (possibly 0) of rows in the partition where x is not NULL. So, as the argument to COUNT, I used
CASE
WHEN ac.flag = 'Y'
THEN 1
-- ELSE NULL -- I did not explicitly say this, but it is the default
ENDwhich returns either
(a) the literal number 1 or
(b) NULL
Instead of the literanl number 1, I could have used any literal or expression, of any data type, that is not NULL). all that matters is we produce something non-NULL for COUNT to count.
<h2>(2) A solution for a new problem involving the same tables</h2>
Also, I was trying to modify this query to fit my other similar requirement where I would need following output
Original output:
SOURCEKEY F ACCTKEY
0 N 9648
0 N 9647
9648 N 9813
9647 Y 9812
So, the query should be smart enough to return only the last two rows where sourcekey >0 which is
SOURCEKEY F ACCTKEY
9648 N 9813
9647 Y 9812
And In case there are only first two 2 rows in the table then , it should return only those two row and not check for sourcekey > 0 which would be .
SOURCEKEY F ACCTKEY
0 N 9648
0 N 9647 Is it something that I should be using analytical function to solve this requirement. I am trying to accomplish this new requirement.If I understand this problem correctly, it does indeed involve mutually exclusive divisions, but in this problem, the divisions correspond more closely to a single column in the table. We want to divide the table into two mutually exclusive groups:
(A) rows where soucekey > 0, and
(B) rows where sourcekey = 0
We could do that with a CASE expression, but there happens to be a built-in function that works very nicely.
SIGN (sourcekey) returns
(A) 1 if sourcekey > 0, and
(B) 0 if sourcekey = 0
But what do we want to do with those divisions? We want to display rows only from the "best" of those divisions, where division (A) is coinsidered "better" than division (B). That is, if there are any rows in division (A), then we want to display only rows in division (A), but if there are no rows in division (A), then (and only then) we want to display rows in divison (B).
This is an example of a Top-N Query , where we want to display N items from the top of an ordered list. A typical top-N query uses an analytic function (either ROW_NUMBER, RANK or DENSE_RANK, depending on how we want to handle ties) to assign numbers to each row (lower numbers for the "better" rows), and then uses "WHERE f <= n" to display only the n "best" ones. (A special case, though a very common one, is where N=1, that is, we're only interested in the row (or rows, if there happens to be a tie) with the "best" value. In this case, most people find it cleare to say "WHERE f = 1" ratehr than "WHERE f <= 1". Your problem is an exmple ot that special case.)
SELECT sourcekey
, flag
, acctkey
FROM (
SELECT ac.sourcekey
, NVL (ac.flag, 'N') AS flag
, ac.acctkey
, DENSE_RANK () OVER (ORDER BY SIGN (sourcekey) DESC) AS division_num
FROM itemtable i
, finance f
, acct ac
WHERE i.itemtableid1 = f.parentid1
AND i.itemtableid2 = f.parentid2
AND f.financekey = ac.financekey
AND i.parenttableid = 19063
WHERE division_num = 1
;Notice I talked about "mutually exclusiive *divisions* " above, not "mutually exclusive *partitions* ".
There is no PARTITION BY in the analytic clause above. PARTITION BY means we want a separate, independent caluclation for each partition. Here, we want one single numbering for the entire result set.
We want all rows that tie for the "best" to be numbered 1, so we have to use DENSE_RANK (or RANK) rather than ROW_NUMBER. -
Urgent , Two Query questions ...
Hello everybody ,
i have created a query in our production system . but i found some people can change my query setting (ex : my local fileds & selection fields ) , has any one can tell me how can i disable the 'Change' function in 'SQ01' ? many thanks !
(i also use 'su24' to check the authorzation object in 'SQ01' , but i don't know which one can help me to solved this case)
another question that is when i execute the query i found one of the field's sequence was wrong . but this query is used everyday & nobody has changed it . but when i use sort this function to make it & it seems ok . therefore i think the problem is in the table index , right ? Has anyone can tell me how to check it ?
Best Regards,
Carloshi Ramki
the query is made by ourselves . the data is only fetched from the billing table (vbrk & vbak) . but today i found some filed's sequence was wrong & i don't know what cause this .
another problem is that could you tell me how to disable 'Change' function in 'SQ01' ?
many thanks ~
Best Regards,
Carlos -
Hi Guys,
I have the following problem - I know I did something wrong, but I cannot figure out how to correct it. Here is my question:
I have a table tableA, with composite key (col1, col2, col3, col4). I mapped the table, and create a Toplink named query (findCol3List)as such:
select distinct col3
from tableA
where col1=#col1 and col2=#col2
I created an EJB session method getCol3List(col1, col2) -
now when I run the application to call this EJB method, I got the following error at line:
List results = (List)session.executeQuery("findCol3List", String.class, params);
Exception Description: Missing descriptor for [java.lang.String] for query named [findCol3List].
I know there are multiple mistakes in my approach, but with my limited Toklink knowledge, I could not figure out.
Any help with be appreciated!hello,
The executeQuery method is trying to look up the "findCol3List" in the descriptor for the class passed in. It is complaining because you passed in String.class which does not have a valid descriptor.
How/where did you define the named query? Chances are you defined it in the class used for TableA, and so should specify it in the executeQuery method:
session.executeQuery("findCol3List", tableA.class, params);
Best Regards,
Chris -
Creating SAP QUERY - question about tables in buisness transactions.
Hello.
I am pretty new to SAP.
I want to create a query, as i so far have successfully done by creating a join in transaction SQVI.
I am useing several tables;
CRMD_ORDERADM_H
CRMD_ORDERADM_I
CRMD_ORDER_INDEX
I have two questions.
1: I try to join CRMD_ORDER_INDEX-PARTNER_NO with BUT000-PARTNER, but it won't do the trick. After a join like this i would like to join BUT000 with ADRC . Can someone explain how i could do this?
2: I want join CRMD_ORDERADM_I with all the partners for the specific Item. (sold-to-party, shipping-party and so on). Can anyone tell me which table(s) i can find this in, and what fields to join.
I will appreciate any answer to thisHi,
For the second question, enter your transaction number ( Object ID ) into <b>CRMD_ORDERADM_H</b> table. Pass the guid to table <b>CRMD_LINK.</b>
Take set guid from CRMD_LINK and pass it to <b>CRMD_PARTNER</b>.
You will get all the partners in that transaction
regards,
Prashant
<b>Kindly Reward the points if helpful !</b> -
I have a process that is going through each account record and doing some processing on it.
This is a time consuming process. It takes close to 20 minutes to complete.
I would like to provide a better status message to my customer to let them know how much longer the process should take.
My question is:
Can I retrieve the count of the number of records that would be returned based on the query criteria I am using?
I would use this to provide a status message like
"Processing account 50 of 120,000"Hi All,
Recently we also had the same requirement, count the number of records and we achieved it by reports.
1. create a report which generates the simply total count of records.
2. on your custom page / application access that report and get the count.
Dinesh
CRMIT -
I am doing a 9-1-1 reporting system. I am selecting calls by
Agency and type of call for a given month. That works fine, but I
need them printed in desending sequence by number call far a call
type. Don't see anyway to accomplish that with one query.
Is that a way? If not, the second part of this question is
that I have not created a table using SQL. I need 3 fields, Field_A
is Text (9 positions); Field_B is Text (40 Positions) and the last
is my summarized count from the query. How do I create a Table to
support this function?
Query
<cfquery name="GetEventCount"
datasource="JasperCountyDB">
select count(AG_ID) as EventCount, TYCOD, TYP_ENG, CURENT
from aeven
where ((AG_ID = '#Session.InquiryAgencyCode#')
AND (CURENT = 'T') AND (CDTS LIKE '#EventReportDate#'))
group by AG_ID, TYCOD, TYP_ENG, CURENT
</cfquery>
Thanks for any guideance that you can provide.
RonYour question wasn't very clear, but if you only want to sort
them by the count in descending order, just ORDER BY 1 DESC.
<cfquery name="GetEventCount"
datasource="JasperCountyDB">
SELECT COUNT(AG_ID) as EventCount, TYCOD, TYP_ENG, CURENT
FROM aeven
WHERE AG_ID = '#Session.InquiryAgencyCode#'
AND CURENT = 'T'
AND CDTS LIKE '#EventReportDate#'
GROUP BY AG_ID, TYCOD, TYP_ENG, CURENT
ORDER BY 1 DESC
</cfquery>
Phil
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