Updating a table with self join

Hi Experts
have a table & data as shown below
read_date
reading
consum
20140915
1000
20140916
NULL
120
20140917
NULL
80
20140918
NULL
100
20140919
1400
as per the requirement missing reading should be updated using reading+consum, and i should get missing readings as 1120,1200,1300 respectively. have tried below query, but its updating just one row.
UPDATE c1 SET reading=c1.consumption+ISNULL(c2.reading,0) FROM @CW_data c1 JOIN @CW_data c2 ON DATEADD(d,-1,c1.read_date)=c2.read_date WHERE c1.reading IS NULL
Please advise.
Thanks & Regards,
Shiva

Please post DDL, so that people do not have to guess what the keys, constraints, Declarative Referential Integrity, data types, etc. in your schema are. Learn how to follow ISO-11179 data element naming conventions and formatting rules. Temporal data should
use ISO-8601 formats. You failed. Code should be in Standard SQL as much as possible and not local dialect.
This is minimal polite behavior on SQL forums. Could tell us why you are special and the rules do not apply to you? Here is my guess at what a polite person would have posted.
CREATE TABLE Foobar_Meters
(reading_date DATE DEFAULT CURRENT_TIMESTAMP NOT NULL
PRIMARY KEY,
foo_reading INTEGER
CHECK( foo_reading >= 0));
What you are trying to do is a running total. Put it in a view so it is always correct:
INSERT INTO Foobar_Meters
VALUES
('2014-09-15', 1000),
('2014-09-16', 120),
('2014-09-17', 80),
('2014-09-18', 100),
('2014-09-19', 0);
CREATE VIEW Cumulative_Readings
AS
SELECT reading_date, foo_reading,
SUM(foo_reading)
OVER (ORDER BY reading_date
ROWS BETWEEN UNBOUNDED PRECEDING AND CURRENT ROW)
AS foo_reading_cum
FROM Foobar_Meters;
>> have tried below query [sic], but its updating just one row. <<
An UPDATE is not a query. Learn the correct terms. And you used the old Sybase UPDATE..FROM.. syntax!! Google it! It does not work!And you used the old ISNULL and not COALESCE().
Back in the days of punch cards, we kept such data in the physical card because we had to!
You have done the wrong thing, the wrong way. The only technique worse would be a cursor.
--CELKO-- Books in Celko Series for Morgan-Kaufmann Publishing: Analytics and OLAP in SQL / Data and Databases: Concepts in Practice Data / Measurements and Standards in SQL SQL for Smarties / SQL Programming Style / SQL Puzzles and Answers / Thinking
in Sets / Trees and Hierarchies in SQL

Similar Messages

Need help with self join query

Hello,
I have table A with the following data
oid parent_oid
10 4
4 2
2 2
12 6
6 6
parent_oid is the parent of oid. I'd like a query that shows the final parent of the oid. The result should show the following
oid final parent
10 2
4 2
2 2
12 6
6 6
I'm using Oracle 10g. I'm familiar with self joins, but that alone will not do the job. Thanks!

Hi,
arizona9952 wrote:
... I'm familiar with self joins, but that alone will not do the job.You're absolutely right!
A 2-way self join would work for rows have no parent, or rows that are directly connected to their final ancestor (such as oid=4), but not for anything farther away.
A 3-way self-join would work for one more level away from the final row, but no more. That would be enough for the small set of sample data that you posted, but it would not work if you added a new row with parent_id=10.
An N-way self-join would work for up to N+1 levels, but no more.
You need something that can go any number of levels, such as CONNECT BY:
SELECT     CONNECT_BY_ROOT oid     AS oid
,     parent_oid          AS final_parent
FROM     a
WHERE     CONNECT_BY_ISLEAF     = 1
CONNECT BY     oid     = PRIOR parent_oid
     AND     oid     != parent_oid
;Edited by: Frank Kulash on Feb 22, 2010 7:09 PM
Upon sober reflection, I think that a Top-Down query, like the one below, would be more efficient than a Bottom-Up query, like the one above:
SELECT     oid
,     CONNECT_BY_ROOT     parent_oid     AS final_parent
FROM     a
START WITH     parent_oid     = oid
CONNECT BY     parent_oid     = PRIOR oid
     AND     oid          != PRIOR oid
;

Recordset - updating 2 tables with 1 recordset using application object update record

I have a recordset that uses a field from 2 different tables
with a select statement where clause that joins a userid. I can
display the field’s data just fine. Now I want to use the
Application object “update record” so I can modify
either of the fields. The problem is the Application object
“update record” only allows you to update one table.
How does Dreamweaver mx 2004 allow me to update 2 tables with one
recordset and 1 submit button? Currently using php.
Example of where:
Where member.userid = member_detail.userid
I tried creating the one form with the field from the first
table and that works just fine. I added the other field from the
other table into the form but ofcourse there isn’t any code
that will update the second table so it won’t work.
My application requires me to update alot of fields between 2
tables at the same time.
Does anyone know a way using Dreamweaver mx 2004 to do this?
I don’t have much php experience.

jon-rookie wrote:
> DreamerJim,
>
> I am sorry but I don't think you are correct. I just
can't believe that with
> all the powers to be at Macromedia and now Adobe can't
figure out how to update
> two tables at once. There are millions of db's out there
that require this. I
> spent several hours today perusing lots of posts on the
internet. It seems I
> am not the only one out there that has asked this
question. Unfortunately
> there are no good answers yet to my surprise.
>
> I did find a Dreamweaver extension that does exactly
what I myself and many
> others want. The problem is it is no longer available
unless you purchase a
> bundle of software from Adobe.
>
> I have not looked into it in detail so I am not 100%
sure that is accurate!
>
> Still, alot of php programmers do this all the time
without much trouble. I
> just want to know if Dreamweaver mx 2004 has the
capability if a person knows
> the right steps.
>
> Hopefully a Dreamweaver expert will post something to
let us know for sure.
> Until then I am stuck.
>
Not even CS3 has this built in, you will either have to code
it yourself
or buy the extension you have found. Dreamweaver gives you
basic
features to help you develop applications, but if you want to
do
anything really clever you have to do it yourself.
One thing to consider is maybe creating an SQL view that is
can be
updated. I am pretty sure it exists, then you use the view
instead of
the table in the update behaviour. I have never done it
myself, but I am
sure it can be done.
Steve

URGENT update a table with a text that has a single quote in it

Hello, I am trying to update a table with a text that has a single quote in it. I believe I need to use two singles quotes but I am not sure how.
For example:
UPDATE TEST
SET DESCRLONG='Aux fins d'exportations'
WHERE etc...
Should I put 2 singles quotes before the quote in the text?
UPDATE TEST
SET DESCRLONG='Aux fins d'''exportations'
WHERE etc...
Thank you very much :)

The best way depends on the version of Oracle.
But, the quick and universal answer is to use two single quotes
SQL> connect test/test
Connected.
SQL> create table test (descrlong varchar2(128));
Table created.
SQL> insert into test values ('This is a string with a '' single quote');
1 row created.
SQL> select * from test;
DESCRLONG
This is a string with a ' single quote
SQL> update test set descrlong='Aux fins d''exportations'
2 where descrlong like 'T%';
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SQL> select * from test;
DESCRLONG
Aux fins d'exportations
SQL>

Is it possible to update multiple tables with a dynamic form?

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I meant
SXMSMSTAT
SXMSSYERR
Thanks.

How can I update the table with a single query for...

I have a table with columns C1 and C2.
C1 C2
A1 null
A1 null
A1 null
A1 null
A2 null
A2 null
A2 null
A3 null
A4 null
A4 null
I want to update my table with a single query so that I would have data like
C1 C2
A1 1
A1 2
A1 3
A1 4
A2 1
A2 2
A2 3
A3 1
A4 1
A4 2
The updated column C2 has the values like serial no grouped on the column C1.

SQL> create table mytable
2 ( c1 varchar2(2)
3 , c2 number(2)
4 )
5 /
Tabel is aangemaakt.
SQL> insert into mytable (c1)
2 select 'A1' from dual union all
3 select 'A1' from dual union all
4 select 'A1' from dual union all
5 select 'A1' from dual union all
6 select 'A2' from dual union all
7 select 'A2' from dual union all
8 select 'A2' from dual union all
9 select 'A3' from dual union all
10 select 'A4' from dual union all
11 select 'A4' from dual
12 /
10 rijen zijn aangemaakt.
SQL> select * from mytable
2 /
C1                                     C2
A1
A1
A1
A1
A2
A2
A2
A3
A4
A4
10 rijen zijn geselecteerd.
SQL> merge into mytable t1
2 using (select c1
3              , row_number() over (partition by c1 order by null) rn
4              , rowid rid
5           from mytable
6        ) t2
7     on (t1.rowid = t2.rid)
8   when matched then
9        update set c2 = rn
10   when not matched then
11        insert values (null,null)
12 /
10 rijen zijn samengevoegd.
SQL> select * from mytable
2 /
C1                                     C2
A1                                      1
A1                                      2
A1                                      3
A1                                      4
A2                                      1
A2                                      2
A2                                      3
A3                                      1
A4                                      1
A4                                      2
10 rijen zijn geselecteerd.Regards,
Rob.

Updating base table with Materialized View's data

Hi,
In order to update base table with MVs data, I am trying real time data transfer between two databases. One is Oracle 8i and other is Oracle 9i. I have created an updatable MV in 9i on a base table using database link. The base table is in 8i. Materialized View log is created in 8i on base table. MV has to be associated to some replication group, but I am not able to create replication group in 9i to which MV has to be associated. The required packages are not installed.
Replication packages are to be used to create replication group are :
/*Create Materialized View replication group*/
BEGIN
DBMS_REPCAT.CREATE_MVIEW_REPGROUP (
gname => 'TEST_MV_GRP',
master => 'TEST_DATA_LINK',
propagation_mode => 'ASYNCHRONOUS');
END;
But above block is giving error.
Can anyone suggest how to resolve this, or are there any other approaches (by not using replication packages) to update base table with MVs data ?
Thanks,
Shailesh

Yes, I created link between two databases and was able to update tables on 8i from 9i database using that link.
The error I am getting while creating replication group is :
ORA-06550
PLS-00201 : identifier 'SYS.DBMS_REPCAT_UTL2@'TEST_DATA_LINK' must be declared
ORA-06550
PLS-00201 : identifier 'SYS.DBMS_REPCAT_UNTRUSTED@'TEST_DATA_LINK' must be declared
ORA-06512 : at "SYS.DBMS_REPCAT_UTL", line 2394
ORA-06512 : at "SYS.DBMS_REPCAT_SNA_UTL", line 1699
ORA-06512 : at "SYS.DBMS_REPCAT_SNA", line 64
ORA-06512 : at "SYS.DBMS_REPCAT", line 1262
Is there any other approach which can be used to update base table with MVs data instead of using replication packages ?
Thanks,
Shailesh

Best way to update a table with disinct values

Hi, i would really appreciate some advise:
I need to reguarly perform a task where i update 1 table with all the new data that has been entered from another table. I cant perform a complete insert as this will create duplicate data every time it runs so the only way i can think of is using cursors as per the script below:
CREATE OR REPLACE PROCEDURE update_new_mem IS
tmpVar NUMBER;
CURSOR c_mem IS
SELECT member_name,member_id
FROM gym.members;
crec c_mem%ROWTYPE;
BEGIN
OPEN c_mem;
LOOP
FETCH c_mem INTO crec;
EXIT WHEN c_mem%NOTFOUND;
BEGIN
UPDATE gym.lifts
SET name = crec.member_name
WHERE member_id = crec.member_id;
EXCEPTION
WHEN NO_DATA_FOUND THEN NULL;
END;
IF SQL%NOTFOUND THEN
BEGIN
INSERT INTO gym.lifts
(name,member_id)
VALUES (crec.member_name,crec.member_id);
END;
END IF;
END LOOP;
CLOSE c_mem;
END update_new_mem;
This method works but is there an easier (faster) way to update another table with new data only?
Many thanks

>
This method works but is there an easier (faster) way to update another table with new data only?
>
Almost anything would be better than that slow-by-slow loop processing.
You don't need a procedure you should just use MERGE for that. See the examples in the MERGE section of the SQL Language doc
http://docs.oracle.com/cd/B28359_01/server.111/b28286/statements_9016.htm
MERGE INTO bonuses D
   USING (SELECT employee_id, salary, department_id FROM employees
   WHERE department_id = 80) S
   ON (D.employee_id = S.employee_id)
   WHEN MATCHED THEN UPDATE SET D.bonus = D.bonus + S.salary*.01
     DELETE WHERE (S.salary > 8000)
   WHEN NOT MATCHED THEN INSERT (D.employee_id, D.bonus)
     VALUES (S.employee_id, S.salary*.01)
     WHERE (S.salary <= 8000);

Updating a table with billion rows

It was an interview question, what's the best way to update a table with 10 billion rows. Give me your suggestions. Thanks in advance.
svk

The best way to answer questions such as this is NOT with a absolute and specific answer. Instead, discuss your strategy for approaching the problem. The first step is to understand your exact requirement. It is surprising how often people
write update statements with an under-qualified where clause. NEVER update a row that does not need to be updated. For example, a statement like:
update mytable set cola = 'ABC' where id in (1, 45, 212);
Assuming id is unique for the table and the specified values exist in the table, we know 3 rows will be updated. Do all of those rows need to be updated? Think about it. If cola is already set to 'ABC' for any of those rows, we could ignore
those rows and make the update more efficient. To do that, you need to add "and cola <> 'ABC' " to the where clause. That is just one example of understanding exactly what you need to do - and doing only that which needs to be done.
Once you understand exactly what you need to do, you need to analyze the impact of the update and identify any potential issues. Updating a lot of rows can take a lot of time and consume large amounts of log and disk space. What else is using
the table? Can you afford to lock the table for the duration of the update? Are there concurrency issues, regardless of whether you update in batches or in one single statement? When using a batch approach, is there an issue if someone runs
a query against the table (i.e., the result is different from that of the same query run after all updates have been completed)? Are you changing something which is included in an index? Are you changing part of the clustered index?
Ultimately, every question you are asked is (or should be) designed to test your problem-solving skills and your skillset. IMO, it is relatively easy to improve your skillset of any particular tool, language, or environment. The other - not so much
and that is why they are more valuable IMO.

UPDATING A TABLE WITH SAME INFO FROM ANOTHER TABLE ON THE SAME DB

0down votefavorite
I am trying to update a table with info from another table on the same db with same table name. I just want the info to be the same , no primary key or constraint involve just a straight replacement of records and I keep getting errors WITH THE TABLE not
being recignize. below is my query:
UPDATE
VNDFIL
SET EOBTYP
= VNDFIL.EOBTYP,
EDI_X12_835_VERSION = VNDFIL.EDI_X12_835_VERSION
FROM
AGERECOVERY
WHERE
VNDFIL.EOBTYP
= VNDFIL.EOBTYP
AND
VNDFIL
.EDI_X12_835_VERSION
= VNDFIL.EDI_X12_835_VERSION

Hi rotary,
If those two same named tables are in the same database then they have to be in different schemas. If you mean they are in the same server instance, then they may be in different databases, besides the "table not being recognized" error,
anyway you should use the fully qualified table names, that is database.Schema.Table(If across instances, ServerName should be prefixed) to avoid the table unrecognized error.
Using Identifiers As Object Names
With the fully qualified names, your update statement can be like below.
UPDATE
db1.schema1.VNDFIL
SET EOBTYP = srcTbl.EOBTYP, EDI_X12_835_VERSION = srcTbl.EDI_X12_835_VERSION
FROM
db1.schema2.VNDFIL srcTbl
WHERE
db1.schema1.VNDFIL.EOBTYP = srcTbl.VNDFIL.EOBTYP AND
db1.schema1.VNDFIL.EDI_X12_835_VERSION = srcTbl.VNDFIL.EDI_X12_835_VERSION
If you have any question, feel free to let me know.
Eric Zhang
TechNet Community Support

How to update two tables with trigger

Hi:
how to update two tables with trigger ?
I have two tables :
(1)ASIA
MI number;
(2)ASIA_P
ID number;
When I insert a new value into the asia.MI ,I also can
insert the same value into the asia_p.id field.
I have write a trigger as follows but it does't work.
create or replace trigger MI_TRG
before insert on asia
for each row
declare
seq number;
begin
select MI_SEQ.Nextval into seq from dual;
:new.MI:=seq;
insert into ASIA_PRO(MI_ID)
values
(seq);
end MI_TRG;
How to realize it ?
thanks
zzm

Why do you say it does not work?

Updating a table with need of table joins

Hi,
I want to update a table (via PL/SQL process) but to do it I need to include joins - and my code throws an error...
How would I go about getting this to work?
UPDATE employees a, action b
SET a.met_employee = '0000'
WHERE b.date_met NOT BETWEEN QA1 AND QA2
AND b.date_met NOT BETWEEN QB1 AND QA2
AND b.date_met NOT BETWEEN QC1 AND QC2
AND b.date_met BETWEEN QD1 AND QD2
AND b.emp_id = P12_ID
AND a.emp_id = P12_ID;
Where QA1, QA2, QB1, QB2, QC1, QC2, QD1, QD2 are variable values of pre-defined dates and P12_ID is the ID variable.
The problem occurs because I need to use the two tables - how can I solve this?
Thanks,
Si

The employee table has multiple actions (action table)
We want to set certain values i.e the '0000' to certain employees that have had actions on certain dates (the defined variables)
So it needs to check all the actions within the set dates and give only employees within this criteria the value '0000'
with the following...
update emplyees
set met_emplyees = '0000'
where emp_id = P12_ID;
that will always set the employee with '0000'. However '0000' should only be set to employees that had actions on certain dates.
Cheers
Si

Problem writing a XSLT to convert XML in desired format from a table having self join

Hello,
I have to write a style sheet to convert XML generated from XSQL into a different format. The query that I have is as follows.
select LEVEL depth,
'H' || hierarchy_id id,
name,
nvl2(parent_id, 'H' || parent_id, 0) parent_id,
CURSOR(select LEVEL depth,
'H' || hierarchy_id hid,
name hname,
nvl2(parent_id, 'H' || parent_id, 0) hparent_id,
decode(system_id, NULL, '0', 'S' || system_id) formatted_system_id,
system_id
from hierarchy
where parent_id = h.hierarchy_id
and system_id is not null
) as systems
from hierarchy h
where system_id is null
start with parent_id is null
connect by prior hierarchy_id = parent_id
The hierarchy table has a self join to itself. The selfjoin is on the hierarchyid and the parentid fields which is evident from the query.
Here the hierarchy table contains the parent system and also the child systems underneath. The problem is that the no. of levels that it can go deep is not fixed. The output of this in sqlplus is as follows.
Depth Hierarchyid, name parentid
1 h1 xxx <null>
2 h2 bbb h1
3 h3 ccc h2
<Cursor for systems>
hid hname hparentid formatted_system_id systemid
h4 ccc h2 s1 1
h5 ccc h2 s2 2
<Back to original data>
Depth Hierarchyid, name parentid
2 h6 ddd h1
2 h7 eee h1
The desired output required from the stylesheet is as follows
<h id=h1 name=xxx>
<h id=h2 name=bbb parentid=h1>
<h id=h3 name=ccc parentid=h2>
<h id=h4 name=fff parentid=h3 systemid=s1>
<h id=h5 name=ggg parentid=h3 systemid=s2>
</h>
</h>
<h id=h6 name=ddd parentid=h1/>
<h id=h7 name=eee parentid=h1/>
</h>
Could some one guide me as to how to get this. I did write a stylesheet which gives me the following output.
<h id=h1 name=xxx>
<h id=h2 name=bbb parentid=h1/>
<h id=h3 name=ccc parentid=h2/>
<h id=h4 name=fff parentid=h3 systemid=s1>
<h id=h5 name=ggg parentid=h3 systemid=s2>
</h>
<h id=h6 name=ddd parentid=h1/>
<h id=h7 name=eee parentid=h1/>
</h>
As you can see I am missing the closing of the tag on the 7th line in the desired format. I have written the following stylesheet.

<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
<xsl:template match="node()|@*">
<xsl:copy>
<xsl:apply-templates select="@*|node()"/>
</xsl:copy>
</xsl:template>

<xsl:template match="HIERARCHY">
<HIERARCHY><xsl:apply-templates/></HIERARCHY>
</xsl:template>

<xsl:template match="HELEMENT">
<xsl:choose>
<xsl:when test="PARENT_ID=0">
<helement id="{ID}" name="{NAME}" parentid="{PARENT_ID}"/>
</xsl:when>
<xsl:when test="PARENT_ID!='0'">
<helement2 id="{ID}" name="{NAME}" parentid="{PARENT_ID}">
<xsl:for-each select="SYSTEMS/SYSTEMS_ROW">
<helement3 id="{HID}" name="{HNAME}" parentid="{HPARENT_ID}" systemid="{FORMATTED_SYSTEM_ID}">
</helement3>
</xsl:for-each>
</helement2>
</xsl:when>
<xsl:otherwise>
</xsl:otherwise>
</xsl:choose>
</xsl:template>
</xsl:stylesheet>
Is there any way of achieving this. Any help would be appreciated. I am using XSQL to generate first the basic XML output and then applying stylesheet to achieve the desired output.
Sincerely,
D

Hello,
I have to write a style sheet to convert XML generated from XSQL into a different format. The query that I have is as follows.
select LEVEL depth,
'H' || hierarchy_id id,
name,
nvl2(parent_id, 'H' || parent_id, 0) parent_id,
CURSOR(select LEVEL depth,
'H' || hierarchy_id hid,
name hname,
nvl2(parent_id, 'H' || parent_id, 0) hparent_id,
decode(system_id, NULL, '0', 'S' || system_id) formatted_system_id,
system_id
from hierarchy
where parent_id = h.hierarchy_id
and system_id is not null
) as systems
from hierarchy h
where system_id is null
start with parent_id is null
connect by prior hierarchy_id = parent_id
The hierarchy table has a self join to itself. The selfjoin is on the hierarchyid and the parentid fields which is evident from the query.
Here the hierarchy table contains the parent system and also the child systems underneath. The problem is that the no. of levels that it can go deep is not fixed. The output of this in sqlplus is as follows.
Depth Hierarchyid, name parentid
1 h1 xxx <null>
2 h2 bbb h1
3 h3 ccc h2
<Cursor for systems>
hid hname hparentid formatted_system_id systemid
h4 ccc h2 s1 1
h5 ccc h2 s2 2
<Back to original data>
Depth Hierarchyid, name parentid
2 h6 ddd h1
2 h7 eee h1
The desired output required from the stylesheet is as follows
<h id=h1 name=xxx>
<h id=h2 name=bbb parentid=h1>
<h id=h3 name=ccc parentid=h2>
<h id=h4 name=fff parentid=h3 systemid=s1>
<h id=h5 name=ggg parentid=h3 systemid=s2>
</h>
</h>
<h id=h6 name=ddd parentid=h1/>
<h id=h7 name=eee parentid=h1/>
</h>
Could some one guide me as to how to get this. I did write a stylesheet which gives me the following output.
<h id=h1 name=xxx>
<h id=h2 name=bbb parentid=h1/>
<h id=h3 name=ccc parentid=h2/>
<h id=h4 name=fff parentid=h3 systemid=s1>
<h id=h5 name=ggg parentid=h3 systemid=s2>
</h>
<h id=h6 name=ddd parentid=h1/>
<h id=h7 name=eee parentid=h1/>
</h>
As you can see I am missing the closing of the tag on the 7th line in the desired format. I have written the following stylesheet.

<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
<xsl:template match="node()|@*">
<xsl:copy>
<xsl:apply-templates select="@*|node()"/>
</xsl:copy>
</xsl:template>

<xsl:template match="HIERARCHY">
<HIERARCHY><xsl:apply-templates/></HIERARCHY>
</xsl:template>

<xsl:template match="HELEMENT">
<xsl:choose>
<xsl:when test="PARENT_ID=0">
<helement id="{ID}" name="{NAME}" parentid="{PARENT_ID}"/>
</xsl:when>
<xsl:when test="PARENT_ID!='0'">
<helement2 id="{ID}" name="{NAME}" parentid="{PARENT_ID}">
<xsl:for-each select="SYSTEMS/SYSTEMS_ROW">
<helement3 id="{HID}" name="{HNAME}" parentid="{HPARENT_ID}" systemid="{FORMATTED_SYSTEM_ID}">
</helement3>
</xsl:for-each>
</helement2>
</xsl:when>
<xsl:otherwise>
</xsl:otherwise>
</xsl:choose>
</xsl:template>
</xsl:stylesheet>
Is there any way of achieving this. Any help would be appreciated. I am using XSQL to generate first the basic XML output and then applying stylesheet to achieve the desired output.
Sincerely,
D

How do I update a view with a join

I have a module with database block based on a view with joins, so I am not able to perform insert, update & delete directly.
Therefore I created an unbound item that can be changed. The relevant database record is searched and updated.
So, with above work around, insert, update & delete is possible.
This works just fine.
Now, the 'save icon' in the menu (diskette icon), does not get activated automatically when there are changes to be saved. This is because the view is not changed.
So, I enable the 'save icon' manually in the when-validate-item trigger. But now when I navigate to another record, the 'save icon' gets de-activated by QMS/headstart code. This is because the view is not changed.
So, I tried set_record_property (CHANGED_STATUS) to let the application
know there are changes to be saved.
But then, I get an error:
* FRM-40654: Record has been updated by another user. Re-query block to see
change.
What is the proper way to handle this problem?
null

Peter,
I think you've gone down the wrong track with your workaround.
You should base your form on the view and allow update and insert to the view just as if it was a table.
If you are using Oracle 8i, create an INSTEAD-OF trigger on the view in the database which redirects the DML to insert or update the appropriate table(s) instead of the view.
If you are pre Oracle 8i, in the form you can create on-insert, on-update, and on-delete triggers to redirect the DML to the appropriate table.
The only other tricky situation comes if you have items in your form that are server-derived (in the TAPI) of the table(s) in question. If so, you must explicitly code the form to retrieve these server-derived values. Also note that with a view, you cannot have a server derived primary key since there would be no way to retrieve it in the form. (Views don't have a rowid.) You must derive primary key columns in the form when the form is based on the view.
Regards,
Lauri

Updating a table with a query that return multiple values

Hi,
I'm trying to update a table which contain these fields : ItemID, InventoryID, total amounts
with a query that return these values itemId, inventoryid and total amounts for each items
Mind you, not all the rows in the table need to be updated. only a few.
This what i wrote but doesn't work since the query return multiple values so i can't assign it to journalAmounts.
UPDATE [bmssa].[etshortagetemp]
SET JournalAmounts = (SELECT sum(b.BomQty) FROM [bmssa].[Bom] b
JOIN [bmssa].[SalesLine] sl ON sl.ItemBomId = b.BomId
JOIN [bmssa].[SalesTable] st ON st.SalesId = sl.SalesId
WHERE st.SalesType = 0 AND (st.SalesStatus IN (0,1,8,12,13)) AND st.DataAreaId = 'sdi'
GROUP BY b.itemid, b.inventdimid)
Any advise how to do this task?

Remember that link to the documentation posted above that explains exactly how to do this. When you read it which part exactly were you having trouble with?

Updating a table with self join

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