Connect to prior sql query
what is mean by CONNECT TO PRIOR? is it SQL keyword?
i have tried following query....
select level,max(sal) from emp
where level=2
connect to prior sal>sal
group by level
please explain above query........
thanx ....
check this also
http://www.oracle.com/technology/oramag/oracle/05-may/o35asktom.html
Similar Messages
-
Connect by prior (hierarchical query)
Hi All,
Some1 asked me a question which goes like this:
Source
emp_no dep_no
110 10
110 20
110 30
110 40
120 10
130 10
130 20
write a query to achieve the following output from the above source
emp_no dept_no
110 10203040
120 10
130 1020
Now I have come across solutions with 'connect by prior' clauses but I am nt able to understand how oracle is producing that result , Could someone point me to a good article or text that can explain this concept very thoroughly( I have searched on google and got to see many articles but I couldnt able to understand it since these articles were not explaining everything)
Regards
RahulYou can try this:
SQL> ed
Wrote file afiedt.buf
1 SELECT deptno,MAX(TRIM(SUBSTR(SYS_CONNECT_BY_PATH(empid,','),2)))
2 KEEP(DENSE_RANK LAST ORDER BY deptno) FROM
3 (SELECT deptno,empid,ROW_NUMBER() OVER(PARTITION BY deptno ORDER BY deptno) curr,
4 ROW_NUMBER() OVER(PARTITION BY deptno ORDER BY deptno) - 1 prev
5 FROM emp)
6 CONNECT BY PRIOR curr = prev
7 AND deptno = PRIOR deptno
8 START WITH curr = 1
9* group by deptno
SQL> /
DEPTNO MAX(TRIM(SUBSTR(SYS_CONNECT_BY_PATH(EMPID,','),2)))KEEP(DENSE_RANKLASTORDERBYDEPTNO)
10 1,2,3,4
20 5,6,7
SQL> select deptno,empid from emp;
DEPTNO EMPID
10 1
10 2
10 3
10 4
20 5
20 6
20 7
7 rows selected.
SQL> -
Can anyone please help with a Connect by PRIOR sql?
Hi,
I am not so well versed in Oracle analytic functions and am having trouble with a sql.
Oracle Version: 9.2.0.1.0
I have a tree table storing heirarchies upto 4 levels.
create table FAMILY_TREE
TREE_ID NUMBER not null,
PARENT_ID NUMBER,
NAME VARCHAR2(100)
I know that using a CONNECT BY PRIOR, I can find out who the previous ancestar is.
select
f.tree_id TreeId,
f.parent_id ParentId,
f.Name Name
from family_tree f
connect by
prior f.tree_id = f.parent_id
start with f.parent_id is null
I need to display all the ancestars in a single line (in different columns), which is where I am stumped.
I need the output, in different columns as :
Joe Jack Harry Rick Ned
Bascially, I need to display in a single row, all the ancestars.
I tried to use joins but it was very very slow due to the fact that I had to perform multiple joins.
Can anyone please point me in the right direction?
Data:
insert into FAMILY_TREE (TREE_ID, PARENT_ID, NAME)
values (1, null, 'Joe');
insert into FAMILY_TREE (TREE_ID, PARENT_ID, NAME)
values (2, 1, 'Jack');
insert into FAMILY_TREE (TREE_ID, PARENT_ID, NAME)
values (3, 2, 'Harry');
insert into FAMILY_TREE (TREE_ID, PARENT_ID, NAME)
values (4, 3, 'Rick');
insert into FAMILY_TREE (TREE_ID, PARENT_ID, NAME)
values (5, 4, 'Ned');This may give you a start
SQL> ed
Wrote file afiedt.buf
1 select f.tree_id TreeId,f.parent_id ParentId,
2 trim(',' from sys_connect_by_path(f.Name,',')) name
3 from family_tree f
4 connect by
5 prior f.tree_id = f.parent_id
6* start with f.parent_id is null
SQL> /
TREEID PARENTID NAME
1 Joe
2 1 Joe,Jack
3 2 Joe,Jack,Harry
4 3 Joe,Jack,Harry,Rick
5 4 Joe,Jack,Harry,Rick,Ned
Message was edited by:
jeneesh
Forgot to refresh.. -
Connect by prior in Oracle 11g
I am upgrading an application from 9i to 11g and I've been told that the connect by prior sql is broken. While I am waiting for the example and the error message, is 11g pickier about looping than 9i was? Can someone point me to some documentation on 10 or 11 changes to hierarchical queries?
Thanks in advance.
JimHi, Jim,
user509659 wrote:
I am upgrading an application from 9i to 11g and I've been told that the connect by prior sql is broken. What do you mean? Post a link, or at least a more complete description of the problem.
While I am waiting for the example and the error message, is 11g pickier about looping than 9i was? Can someone point me to some documentation on 10 or 11 changes to hierarchical queries?There were a lot of improvements to CONNECT BY in Oracle 10, including CONNECT BY NOCYCLE (for working with loops), the CONNECT_BY_ROOT operator, and pseudo-columns CONNECT_BY_ISCYCLE and CONNECT_BY_ISLEAF. Look them up in the SQL Language manual for your version.
I don't know of any improvements or changes to CONNECT BY in Oracle 11.
Oracle 11.2 has recursive WITH clauses, that can do everything that CONNECT BY does, and more. Some things in 11.2 are simpler and more efficient using CONNECT BY, others are better done using recursive WITH clauses.
Everything that CONNECT BY did in earlier versions, it does in Oracle 11, as well. If you have a CONNECT BY query that works in Oracle 9, it should work in Oracle 11, without any changes, though there might be better ways to get the same results in Oracle 11.
Whenever you have a question, post youir code, and whatever is necessary to run it, including CREATE TABLE and INSERT statments for a little sample data. Post the results you want from that sample data, and an explanation of how you get those results from that data.
Always say which version of Oracle you're using, e.g. 11.2.0.2.0. The difference between 11.1 and 11.2 may be very significant in this case.
See the forum FAQ {message:id=9360002} -
Repair Problem with Excel Removing All But First External SQL Query Tables
We have an Excel 2007 XLSX workbook that we created for doing some business analysis from the SQL database that contains data from our MRP system. It started as a single sheet with one data connection running a SQL query. The data comes into
the spreadsheet as a table and there are some basic row and column sums being done.
After getting the first version up and running without problems, we decided to add some additional sheets to the same workbook. Since each of these additional sheets had only slight variations to the SQL query and the formatting was all to be the same, we
simply copied the first sheet and modified the data connection for each successive sheet (each copy automatically created a copy of the data connection as well). Everything seemed to be up and running properly, so we saved and closed the workbook.
A little bit later, the same workbook was re-opened and Excel reported that "Excel found unreadable content in '<file name>'. Do you want to recover the contents of this workbook? If you trust the source of this workbook, click Yes." If Yes
is clicked, then Excel indicates the repairs that were made. Only one was made for each sheet beyond the first and that was "Removed Part: /xl/queryTables/queryTable2.xml part. (External data range)". The result was that the data connection
was deleted from every sheet other than the first and only static data left in place.
We thought it might have actual been some corruption, so we deleted the static sheets and recreated them the same way. After saving and closing, re-opening the file resulted in the same problem. It seems that Excel is somehow saving data that it can't read
when it opens. I would think it could be something in the SQL query, but all sheets have essentially the same SQL query, so I'm not sure why the first sheet survives. As a result, I think it must be something that it does in copying the sheet and the corresponding
data connections, but I'm not sure.
I think this might be some kind of bug, but would like to know if anyone else has encountered a similar problem and found a solution. A few internet searches didn't give me much to check out.
Thanks in advance,
indyvqlKR,
Thanks for your response. I don't think it applies in this case since the file was created brand new in Excel 2007 and used in the same. There was no 3rd-party program involved. I'm also not migrating from 2003 to 2010 as the stellarinfo.com article
suggests. Some of the other suggestions there also don't make any difference as all the data links are lost on opening the worksheet, so copying and pasting doesn't do any good.
I tried to create a simple example by creating a new workbook with a sheet with a very simple SQL query ("select * from X where a > b"), but in that example it worked fine. I'm guessing there is something key about the much more complex SQL query
in my original file with the problem, but I'm not sure why it would only affect copies of the data connection and not the original data connection itself.
Thanks,
indyvql -
SQL with connect by prior running for a long time
Hi,
We are using Oracle 10g. Below is a cursor sql which is having performance issues. The pAccountid is being passed from the output of a different cursor. But this cursor sql is running for a long time. Could you please help me in tuning this sql. I believe the subquery with connect by prior is causing the trouble.
The TRXNS is a huge table which is not partitioned. The query is forced to use the index on the accountid of the TRXNS table.
The accountlink table has 20,000 records and the TRXNStrack table has 10,000 records in total.
This sql executes for 200,000 pAccountids and runs for more than 8 hours.
SELECT /*+ INDEX(T TRXNS_ACCOUNTID_NIDX) */ AL.FROMACCOUNTID oldaccountid ,
A.ACCOUNTNUM oldaccountnum,
T.TRXNSID,
T.TRXNSTYPEID,
T.DESCRIPTION ,
T.postdt,
T.TRXNSAMT
FROM
ACCOUNTLINK AL,
TRXNS T,
ACCOUNT A
WHERE AL.TOACCOUNTID IN
(SELECT TOACCOUNTID FROM ACCOUNTLINK START WITH TOACCOUNTID = pAccountid
CONNECT BY PRIOR FROMACCOUNTID = TOACCOUNTID)
AND AL.FROMACCOUNTID = T.ACCOUNTID
AND A.ACCOUNTID = AL.FROMACCOUNTID
AND NOT EXISTS (select 1 from TRXNStrack trck where trck.TRXNSid = t.TRXNSid AND TRXNSTrackReasonid = 1)
AND T.postdt > A.CLOSEDATE
AND T.postdt >= sysdate-2
AND T.postdt <= sysdate;
Create script for trxn table:
CREATE TABLE SP.TRXNS
TRXNSID NUMBER(15) CONSTRAINT "BIN$rpIQEeyLDfbgRAAUT4DEnQ==$0" NOT NULL,
ACCOUNTID NUMBER(15) CONSTRAINT "BIN$rpIQEeyMDfbgRAAUT4DEnQ==$0" NOT NULL,
STATEMENTID NUMBER(15),
TRXNSTYPEID NUMBER(15),
DESCRIPTION VARCHAR2(80 BYTE),
postdt DATE,
TRXNSAMT NUMBER(12,2),
TRXNSREQID NUMBER(15),
LASTUPDATE DATE,
SOURCEID NUMBER(15),
HIDE VARCHAR2(1 BYTE)
TABLESPACE SO_TRXN_DATA
RESULT_CACHE (MODE DEFAULT)
PCTUSED 40
PCTFREE 10
INITRXNS 2
MAXTRXNS 255
STORAGE (
INITIAL 50M
NEXT 1M
MINEXTENTS 1
MAXEXTENTS UNLIMITED
PCTINCREASE 0
FREELISTS 8
FREELIST GROUPS 1
BUFFER_POOL DEFAULT
FLASH_CACHE DEFAULT
CELL_FLASH_CACHE DEFAULT
LOGGING
NOCOMPRESS
NOCACHE
NOPARALLEL
MONITORING;
CREATE INDEX SP.TRXNS_ACCOUNTID_NIDX ON SP.TRXNS
(ACCOUNTID, postdt)
LOGGING
TABLESPACE SO_TRXN_INDEX
PCTFREE 10
INITRXNS 2
MAXTRXNS 255
STORAGE (
INITIAL 64K
NEXT 1M
MINEXTENTS 1
MAXEXTENTS UNLIMITED
PCTINCREASE 0
FREELISTS 1
FREELIST GROUPS 1
BUFFER_POOL DEFAULT
FLASH_CACHE DEFAULT
CELL_FLASH_CACHE DEFAULT
NOPARALLEL;
below is the executing plan for this sql taken from toad :
PLAN_ID
TIMESTAMP
OPERATION
OPTIONS
OBJECT_OWNER
OBJECT_NAME
OBJECT_ALIAS
OBJECT_INSTANCE
OBJECT_TYPE
OPTIMIZER
SEARCH_COLUMNS
ID
PARENT_ID
DEPTH
POSITION
COST
CARDINALITY
BYTES
CPU_COST
IO_COST
TEMP_SPACE
ACCESS_PREDICATES
FILTER_PREDICATES
PROJECTION
TIME
QBLOCK_NAME
1121
9/10/2013 3:30
FILTER
1
0
1
1
NOT EXISTS (SELECT 0 FROM "TRXNSTRACK" "TRCK" WHERE "TRXNSTRACKREASONID"=1 AND "TRCK"."TRXNSID"=:B1)
AL."FROMACCOUNTID"[NUMBER,22], "T"."TRXNSID"[NUMBER,22], "T"."TRXNSTYPEID"[NUMBER,22], "T"."DESCRIPTION"[VARCHAR2,80], "T"."POSTDT"[DATE,7], "T"."TRXNSAMT"[NUMBER,22], "A"."ACCOUNTNUM"[VARCHAR2,19]
SEL$5DA710D3
1121
9/10/2013 3:30
FILTER
2
1
2
1
SYSDATE@!-2<=SYSDATE@!
AL."FROMACCOUNTID"[NUMBER,22], "T"."TRXNSID"[NUMBER,22], "T"."TRXNSTYPEID"[NUMBER,22], "T"."DESCRIPTION"[VARCHAR2,80], "T"."POSTDT"[DATE,7], "T"."TRXNSAMT"[NUMBER,22], "A"."ACCOUNTNUM"[VARCHAR2,19]
1121
9/10/2013 3:30
NESTED LOOPS
3
2
3
1
(#keys=0) "AL"."FROMACCOUNTID"[NUMBER,22], "T"."TRXNSID"[NUMBER,22], "T"."TRXNSTYPEID"[NUMBER,22], "T"."DESCRIPTION"[VARCHAR2,80], "T"."POSTDT"[DATE,7], "T"."TRXNSAMT"[NUMBER,22], "A"."ACCOUNTNUM"[VARCHAR2,19]
1121
9/10/2013 3:30
NESTED LOOPS
4
3
4
1
5
1
119
3989858
4
(#keys=0) "AL"."FROMACCOUNTID"[NUMBER,22], "T"."TRXNSID"[NUMBER,22], "T"."TRXNSTYPEID"[NUMBER,22], "T"."DESCRIPTION"[VARCHAR2,80], "T"."POSTDT"[DATE,7], "T"."TRXNSAMT"[NUMBER,22], "A".ROWID[ROWID,10]
1
1121
9/10/2013 3:30
NESTED LOOPS
5
4
5
1
4
1
90
3989690
3
(#keys=0) "AL"."FROMACCOUNTID"[NUMBER,22], "T"."TRXNSID"[NUMBER,22], "T"."TRXNSTYPEID"[NUMBER,22], "T"."DESCRIPTION"[VARCHAR2,80], "T"."POSTDT"[DATE,7], "T"."TRXNSAMT"[NUMBER,22]
1
1121
9/10/2013 3:30
HASH JOIN
SEMI
6
5
6
1
3
2
54
3989094
2
AL."TOACCOUNTID"="TOACCOUNTID"
(#keys=1) "AL"."FROMACCOUNTID"[NUMBER,22]
1
1121
9/10/2013 3:30
INDEX
FULL SCAN
SP
ACCOUNTLINK_AK1
AL@SEL$1
INDEX (UNIQUE)
ANALYZED
7
6
7
1
1
18
252
107
1
AL."FROMACCOUNTID"[NUMBER,22], "AL"."TOACCOUNTID"[NUMBER,22]
1
SEL$5DA710D3
1121
9/10/2013 3:30
VIEW
SYS
VW_NSO_1
VW_NSO_1@SEL$5DA710D3
11
VIEW
8
6
7
2
2
18
234
107
1
TOACCOUNTID[NUMBER,22]
1
SEL$683B0107
1121
9/10/2013 3:30
CONNECT BY
NO FILTERING WITH START-WITH
9
8
8
1
TOACCOUNTID=PRIOR "FROMACCOUNTID"
TOACCOUNTID=56354162
TOACCOUNTID[NUMBER,22], "FROMACCOUNTID"[NUMBER,22], PRIOR NULL[22], LEVEL[4]
SEL$683B0107
1121
9/10/2013 3:30
INDEX
FULL SCAN
SP
ACCOUNTLINK_AK1
ACCOUNTLINK@SEL$3
INDEX (UNIQUE)
ANALYZED
10
9
9
1
1
18
252
107
1
ACCOUNTLINK.ROWID[ROWID,10], "FROMACCOUNTID"[NUMBER,22], "TOACCOUNTID"[NUMBER,22]
1
SEL$3
1121
9/10/2013 3:30
TABLE ACCESS
BY INDEX ROWID
SP
TRXNS
T@SEL$1
2
TABLE
ANALYZED
11
5
6
2
1
1
63
298
1
T."TRXNSID"[NUMBER,22], "T"."TRXNSTYPEID"[NUMBER,22], "T"."DESCRIPTION"[VARCHAR2,80], "T"."POSTDT"[DATE,7], "T"."TRXNSAMT"[NUMBER,22]
1
SEL$5DA710D3
1121
9/10/2013 3:30
INDEX
RANGE SCAN
SP
TRXNS_ACCOUNTID_NIDX
T@SEL$1
INDEX
ANALYZED
2
12
11
7
1
1
1
224
1
AL."FROMACCOUNTID"="T"."ACCOUNTID" AND "T"."POSTDT">=SYSDATE@!-2 AND "T"."POSTDT"<=SYSDATE@!
T.ROWID[ROWID,10], "T"."POSTDT"[DATE,7]
1
SEL$5DA710D3
1121
9/10/2013 3:30
INDEX
UNIQUE SCAN
SP
ACCOUNT_PK
A@SEL$1
INDEX (UNIQUE)
ANALYZED
1
13
4
5
2
1
1
90
1
A."ACCOUNTID"="AL"."FROMACCOUNTID"
A.ROWID[ROWID,10]
1
SEL$5DA710D3
1121
9/10/2013 3:30
TABLE ACCESS
BY INDEX ROWID
SP
ACCOUNT
A@SEL$1
3
TABLE
ANALYZED
14
3
4
2
1
1
29
168
1
A."CLOSEDATE"<SYSDATE@! AND "T"."POSTDT">"A"."CLOSEDATE"
A."ACCOUNTNUM"[VARCHAR2,19]
1
SEL$5DA710D3
1121
9/10/2013 3:30
INDEX
RANGE SCAN
SP
TRXNSTRACK_TRXNSID_NIDX
TRCK@SEL$6
INDEX
ANALYZED
2
15
1
2
2
1
1
10
73
1
TRCK."TRXNSID"=:B1 AND "TRXNSTRACKREASONID"=1
TRCK."TRXNSID"[NUMBER,22], "TRXNSTRACKREASONID"[NUMBER,22]
1
SEL$6
Please help me in debugging this thanks!Hi,
Thanks for your thought on this subject. Below is the trace info that I got from the DBA
SQL ID: d0x879qx2zgtz Plan Hash: 4036333519
SELECT /*+ INDEX(T TRXNS_ACCOUNTID_NIDX) */ AL.FROMACCOUNTID OLDACCOUNTID ,
A.ACCOUNTNUM OLDACCOUNTNUM, T.TRXNSID, T.TRXNSTYPEID, T.DESCRIPTION ,
T.POSTDT, T.TRXNSAMT
FROM
ACCOUNTLINK AL, TRXNS T, ACCOUNT A WHERE AL.TOACCOUNTID IN (SELECT
TOACCOUNTID FROM ACCOUNTLINK START WITH TOACCOUNTID = :B3 CONNECT BY PRIOR
FROMACCOUNTID = TOACCOUNTID) AND AL.FROMACCOUNTID = T.ACCOUNTID AND
A.ACCOUNTID = AL.FROMACCOUNTID AND NOT EXISTS (SELECT 1 FROM TRXNSTRACK
TRCK WHERE TRCK.TRXNSID = T.TRXNSID AND TRXNSTRACKREASONID = :B4 ) AND
T.POSTDT > A.CLOSEDATE AND T.POSTDT >= :B2 AND T.POSTDT <= :B1
call count cpu elapsed disk query current rows
Parse 0 0.00 0.00 0 0 0 0
Execute 17160 2.10 1.87 0 0 0 0
Fetch 17160 7354.61 7390.86 169408 5569856 883366791 0
total 34320 7356.71 7392.74 169408 5569856 883366791 0
Misses in library cache during parse: 0
Optimizer mode: CHOOSE
Parsing user id: 38 (recursive depth: 1)
SQL ID: gs89hpavb4cts Plan Hash: 3415795327
SELECT A.ACCOUNTID, C.MEMBERID, A.PROGRAMID, A.ACCOUNTNUM
FROM
CUSTOMER C, CUSTOMERACCOUNT CA, ACCOUNT A, PROGRAMPARAMVALUE PPV,
BATCHPROCESSPROGRAM BP WHERE A.PROGRAMID = BP.PROGRAMID AND A.PROGRAMID =
PPV.PROGRAMID AND A.ACCOUNTID = CA.ACCOUNTID AND CA.PERSONID = C.PERSONID
AND PPV.PARAMID = :B2 AND PPV.VALUE = 'Y' AND BP.PROCESSID = :B1 AND BP.RUN
= 'Y' AND A.ACCOUNTTYPEID = 4 AND A.ACCOUNTSTATUSID = 1 AND C.MEMBERID IS
NOT NULL
call count cpu elapsed disk query current rows
Parse 0 0.00 0.00 0 0 0 0
Execute 0 0.00 0.00 0 0 0 0
Fetch 172 13.14 115.34 80826 278650 0 17200
total 172 13.14 115.34 80826 278650 0 17200
Misses in library cache during parse: 0
Parsing user id: 38 (recursive depth: 1)
OVERALL TOTALS FOR ALL NON-RECURSIVE STATEMENTS
call count cpu elapsed disk query current rows
Parse 0 0.00 0.00 0 0 0 0
Execute 0 0.00 0.00 0 0 0 0
Fetch 0 0.00 0.00 0 0 0 0
total 0 0.00 0.00 0 0 0 0
Misses in library cache during parse: 0
OVERALL TOTALS FOR ALL RECURSIVE STATEMENTS
call count cpu elapsed disk query current rows
Parse 0 0.00 0.00 0 0 0 0
Execute 17160 2.10 1.87 0 0 0 0
Fetch 17332 7367.75 7506.21 250234 5848506 883366791 17200
total 34492 7369.85 7508.09 250234 5848506 883366791 17200
Misses in library cache during parse: 0
2 user SQL statements in session.
0 internal SQL statements in session.
2 SQL statements in session.
Trace file: svoprod_ora_12346.trc
Trace file compatibility: 11.1.0.7
Sort options: default
1 session in tracefile.
2 user SQL statements in trace file.
0 internal SQL statements in trace file.
2 SQL statements in trace file.
2 unique SQL statements in trace file.
66499 lines in trace file.
7516 elapsed seconds in trace file. -
How to use simple SQL instead of Connect By Prior
Currently, I am using "connect by prior" query in the application, but for reason I don�t want to use this connect by query so can any one please tell how does I get the same result by using SQL, I tried this by using procedure but unable to get the same result, specially LEVEL of the tree.
So please tell, how would I get the correct data.
Thanks in advance,
AMIT.Hi,
Whenever you have a question, it helps to post:
(1) The version of Oracle (and any other relevant software) you're using
(2) A little sample data (just enough to show what the problem is) from all the relevant tables
(3) The results you want from that data
(4) Your best attempt so far (formatted) I don't believe the unformated code you posted is what you're really running, since it has a syntax error ("... WHERE START WITH ..."). Please post code that really works with the sample data you posrted.
(5) The full error message (if any), including line number
Executable SQL statements (like "CREATE TABLE AS ..." or "INSERT ..." statements) are best for (2).
If you can present your problem using commonly available tables (for example, scott.emp, which contains a hierarchy), then you can omit (2).
Formatted tabular output is okay for (3). Type these 6 characters
{code}
(small letters only, inside curly brackets) before and after the tabular text, to preserve spacing.
As Alex said, why don't you want to use CONNECT BY?
Are you getting the correct results now, but just looking for a different way of getting them?
Depending on your exact requirements, you could write a PLSQL function that mimics LEVEL. Don't expect it to be fast.
Nested Sets is a completely different way of modeling trees.
Some things are much easier with Nested Sets than they are using the Adjacency Model (the parent-child model that uses CONNECT BY).
But some things are much harder with Nested Sets, and LEVEL is one of them. -
Query tuning for query using connect by prior
I have written following query to fetch the data. The query is written in this format because there are multiple rows, which make one recrd and we need to bring that record into one row.
For one CAT(commented here), this query takes around 4 minutes and fetches 6900 records but when it runs for 3 CAT, it takes 17 mins.
I want to tune this as this has to run for 350 CAT values.
It is doing FTS on the main table. I tried to use different hints like PARALLEL, APPEND (in insert) but nothing worked.
The cost of the query is 51.
Any help/suggestions will be appreciated.
SELECT DISTINCT MIN(SEQ) SEQ,
PT, APP, IT, LR, QT,CD, M_A_FLAG,
STRAGG(REM) REM, -- aggregates the data from different columns to one which is parent
CAT
FROM (WITH R AS (SELECT CAT, SEQ, PT, M_A_FLAG, IT, LR,QT,CD, REM, APP
FROM table1
WHERE REC = '36' AND M_A_FLAG = '1'
--AND CAT = '11113')
SELECT CAT, SEQ,
CONNECT_BY_ROOT PT AS PT,
CONNECT_BY_ROOT APP AS APPL,
M_A_FLAG,
CONNECT_BY_ROOT IT AS IT,
CONNECT_BY_ROOT LR AS LR,
CONNECT_BY_ROOT QT AS QT,
CONNECT_BY_ROOT CD AS CD,
REM
FROM R A
START WITH PT IS NOT NULL
CONNECT BY PRIOR SEQ + 1 = SEQ
AND PRIOR CAT = CAT
AND PT IS NULL)
GROUP BY PT, APP, IT,LR, QT, CD, M_A_FLAG, CAT
ORDER BY SEQ;
Thanks.
Edited by: user2544469 on Feb 11, 2011 1:12 AMThe following threads detail the approach and information required.
Please gather relevant info and post back.
How to post a SQL tuning request - HOW TO: Post a SQL statement tuning request - template posting
When your query takes too long - When your query takes too long ... -
CONNECT BY PRIOR and performance of Query Plan
Anyone,
I have an SQL Statement that is performing rather slow and I am trying to figure out if I could optimize it. Here is the SQL:
SELECT/*+ index(MAXIMO.EQNDX99) */
maximo.equipment.eqnum, maximo.equipment.parent, LEVEL
FROM maximo.equipment@maxi_dblink
WHERE parent = :b1 CONNECT BY PRIOR eqnum = parent
ORDER BY eqnum, LEVELAfter some research in this board I followed some advice found to create an index on the table for both the eqnum, parent and the parent, eqnum. EQNDX99 and EQNDX999 respectivley.
Now the Qery Plan for this query shows the following:
SELECT STATEMENT (REMOTE)
SORT (ORDER BY)
FILTER
CONNECT BY
INDEX (FAST FULL SCAN) EQNDX99 (NON-UNIQUE)
TABLE ACESS (BY USER ROWID) EQUIPMENT
INDEX (RANGE SCAN) EQNDX999 (NON-UNIQUE)Now it appears to be using both indexes but it is operating through a DBLINK. Is there anything else I can do to increase performance??? It appears to be using the HINT through the link as well.
Thanks for any help I can get,
David Millerhow long does it takes to complete the query?
-
Problem Creating a query for a hierarchical tree. [using connect by prior]
Hi all,
I have 2 tables.
box (box_id, box_name)
item(item_id, item_name, box_id)
In a box there are several items.
I want to create a hierachical tree to display items that are present in each box.
LIKE:
|---BOX1
| |----ITEM 1
| |----ITEM 2
|
|---BOX2
| |----ITEM 1
| |----ITEM 2
Currently i am trying this query:
SELECT -1 state, box_name, 'icon' icon, box_id val
from box b, item i;
I don't know what value to put for level, i don't know how to code the 'connect by prior' part.
Could you please advise me?
Michaël.
PS. Then i will eventually use this query in forms builder.Note the name of this forum is "SQL Developer *(Not for general SQL/PLSQL questions)*" - so only for issues with the SQL Developer tool. Please post these questions under the dedicated SQL And PL/SQL forum.
Regards,
K. -
Complex connect by prior query
I need SQL(for hierarchical tree) for a function which accepts node as input parameter and returns ref cursor.
Following is a sample tree:
1
--2.1
----3.1
------4.1
--------5.1
----------6.1
----------6.2
----3.2
------4.2
--------5.2
--2.2
----3.2
------4.2
--------5.2
----3.3
----3.4
------4.1
--------5.1
----------6.1
----------6.2
1 is at the root level and 2.1 & 2.2 are immediate children and so on.
The output tree should be all related parents and children of the passed node.
e.g:
If the input is 4.1, the output tree will be:
1
--2.1
----3.1
------4.1
--------5.1
----------6.1
----------6.2
--2.2
----3.4
------4.1
--------5.1
----------6.1
----------6.2
If the input is 4.2, the output tree will be:
1
--2.1
----3.2
------4.2
--------5.2
--2.2
----3.2
------4.2
--------5.2
The complex part, I guess, is to remove unwanted(not related) branches from the tree.
Following is the representation of the table RELATIONSHIP
ID PARENT CHILD
1-------1-------2.1
2-------1-------2.2
3-------2.1-----3.1
4-------2.1-----3.2
5-------2.2-----3.2
6-------2.2-----3.3
7-------2.2-----3.4
8-------3.1-----4.1
9-------3.2-----4.2
10------3.4-----4.1
11------4.1-----5.1
12------4.2-----5.2
13------5.1-----6.1
14------5.1-----6.2
Pls. help me out to form this CONNECT BY PRIOR query.
Thanks in advance.make sure you include 2 things in your queries.
# the row number
# the level
for traversing up the tree set
level = 0 - level and
row_number = 0 - row_number.
you than can then do an order by row_number if you union the two queries
for example:
============
select tbl.child,
tbl.parent,
level lvl,
rownum rn
from some_table tbl
start with tbl.parent = 4.1
connect by prior tbl.child = tbl.parent
union
select tbl.child,
tbl.parent,
0 - level lvl,
0 - rownum rn
from some_table tbl
start with tbl.child = 4.1
connect by prior tbl.parent = tbl.child
order by rn asc -
Connect by prior working in sql but not in forms 10g hierarchical tree
Hello Friends,
I have the following connect by prior example which is working in sql command prompt but not in Forms 10g hierarchical tree item type. Can you please let me know why ?
configuration: Forms 10g patchset 10.1.2.0.2 and oracle 11g database on windows 7
SQL> SELECT 1 InitialState,
2 level Depth,
3 labeller NodeLabel,
4 NULL NodeIcon,
5 to_char(reportno) NodeValue
6 FROM reports where formname = 'billinin.fmx' or reportno > 9999
7 start with reportno > 9999
8 CONNECT BY PRIOR reportno = labelno
9 /
INITIALSTATE DEPTH NODELABEL N NODEVALUE
1 1 FIRST 10000
1 2 report1 UD Label 1
1 2 report2 UD Label 2
1 2 report3 UD Label 3
1 1 SECOND 10001
1 1 THIRD 10002
If I write this command in forms hierarchical tree, then it is working, why not the above code ?
SQL> SELECT 1 InitialState,
2 level Depth,
3 labeller NodeLabel,
4 NULL NodeIcon,
5 to_char(reportno) NodeValue
6 FROM reports
7 start with reportno > 9999
8 CONNECT BY PRIOR reportno = labelnoThanks Room,
This command worked ! I will put the sample working code here. It will help you to filter the records in a tree in sql command prompt as well as in forms hierarchical tree 10g.
SELECT 1 InitialState,
level Depth,
labeller NodeLabel,
NULL NodeIcon,
to_char(reportno) NodeValue
FROM reports
start with reportno > 9999
CONNECT BY PRIOR reportno = labelno
AND FORMNAME = :reports.testitem -
Issue with the below query. The query is not getting filtered for the condition hier_typ_c in('BS') with the connect by prior
query. query is fetching all the hier_type_c in the table like 'BS', 'CO', 'EC' etc....
Just wondering how do i restrict the query just to fetch the type_c ='BS' alone? why is it giving all the records??
Select
Level as LEVEL_CODE,
h.HIER_PRNT_NODE_I as PARENT,
h.HIER_CHLD_NODE_I as CHILD,
h.HIER_CHLD_NODE_X || ' (' || h.HIER_CHLD_NODE_I || ')' as ALIAS
From (Select Distinct HIER_CHLD_NODE_I, HIER_PRNT_NODE_I,
HIER_CHLD_NODE_X from .HIER_DIMN
where hier_typ_c in('BS') and CURR_VER_C = 'Y') h
Start with h.HIER_PRNT_NODE_I = 'ROOT'
Connect by prior
h.HIER_CHLD_NODE_I = h.HIER_PRNT_NODE_I
Order by LEVEL_CODE, parent, childHi
It loks like you're doing it right.
By basing the CONNECT BY query on a sub-query that has this WHERE clasue:
where hier_typ_c in('BS') and CURR_VER_C = 'Y') hyou should exclude not only nodes whose hier_typ_c is not 'BS', but also their descendants.
Post some sample data (CREATE TABLE and INSERT statements) and the results you want from that data.
Are you sure the query you posted is what you're actually running?
I would expect the sub-query FROM clause to cause an error because of the '.'.
from .HIER_DIMNEdited by: Frank Kulash on Sep 29, 2009 11:16 AM -
SQL query to get the Datetime 06 hours prior to the table Datetime value
Hi Experts,
I'm just trying to create a SQL query to get the Datetime which should be 06 hours prior to my Table column value(Executiontime),
Eg: my Executiontime(column) value is 07:00AM means, this query should fetch the detail of first VMName from table at 01:00AM,
SQL Table Name: TestTable
Columns: VMName(varchar),status(varchar) Executiontime(Datetime)
SQL Query : Select Top 1 VMName from
TestTable where convert(date,Exeutiontime)=convert(date,getdate()) and
status='0' and ExecutionTime > dateadd(hour,6,getdate())
Request someone to alter this Query to my requirement or give me the new one.
Regards,
Sundar
SundarHi All,
Thanks for your Prompt response. I tried the below queries, but still I don't have any luck. Actually the queries are returning the value before the condition met (say when the time difference is more than 06 hours). I want the
query to return exactly @ 06 hour difference or less than 06 hours,
Query 01: Select Top 1 VMName from TestTable where
convert(date,Exeutiontime)=convert(date,getdate())
and status='0'
and ExecutionTime >
dateadd(hour,-6,getdate())
Query 02: Select
Top 1 VMName from TestTable where
status='0'
and ExecutionTime >
dateadd(hour,-6,getdate())
Query 03: Select
Top 1 VMName from TestTable where status='0'
and ExecutionTime >
dateadd(hour,-6,ExecutionTime)
Can someone point out the mistake please.
Regards,
Sundar
Sundar -
Strange Behaviour of Connect By Prior query
Has anybody faced a problem like your query returns alternative record like suppose you have 10 records in a table and your connect by prior query gives you 1st, 3rd, 5th and so on. My query was working fine few days back but suddenly its giving me different result. I don't know whether there was some settings changed by someone or not.
Can't guess anything from here. You need to post the query, sample data and the result.
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