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Open & Fetch cursor for inserting into temp table in oracle
I have to fetch the values returned by the first set of query to an Open Cursor and Insert into a Temp Table.
I am not familiar with Open - Fetch Cursor, Looking for syntax help !!
I am not familiar with Open - Fetch Cursor, Looking for syntax help !!
-- This query returns 101 row of records.
select svc_pvr_pyr_nr from tcomgrp
where sls_grp_cd ='IS'
and sales_vew_cd ='S1709'
and dat_cx_tm_prd_nr = '85'
minus
select svc_pvr_pyr_nr from tcomgrp
where sls_grp_cd ='IS'
and sales_vew_cd ='S1709'
and dat_cx_tm_prd_nr = '0';
-- I have to pass each row of record into the select query paramter and insert the Temp Table.x`x`
CREATE TABLE TempTCompGRP_Context_0
AS
SELECT * FROM TCOMGRP
WHERE SLS_GRP_CD ='IS'
AND SALES_VEW_CD ='S1709'
AND DAT_CX_TM_PRD_NR = '85'
AND SVC_PVR_PYR_NR = [ VALUE WHICH I GET FROM MINUS QUERY ]
Who is Participating?
See this example
1 DECLARE
2 l_total INTEGER := 10000;
3
4 CURSOR employee_id_cur
5 IS
6 SELECT employee_id
7 FROM plch_employees
8 ORDER BY salary ASC;
9
10 l_employee_id employee_id_cur%ROWTYPE;
11 BEGIN
12 OPEN employee_id_cur;
13
14 LOOP
15 FETCH employee_id_cur INTO l_employee_id;
16 EXIT WHEN employee_id_cur%NOTFOUND;
17
18 assign_bonus (l_employee_id, l_total);
19 EXIT WHEN l_total <= 0;
20 END LOOP;
21
22 CLOSE employees_cur;
23 END;
Well usually you either do not need a temp table orthe cursor. Why is this need of this combined need?
On running this query, I get 45 records.
When i use Create Temp Table - I get 720 records.
SELECT svc_pvr_pyr_nr
FROM tcomgrp
WHERE sls_grp_cd = 'IS'
AND sales_vew_cd = 'S1709'
AND dat_cx_tm_prd_nr = '85'
MINUS
SELECT svc_pvr_pyr_nr
FROM tcomgrp
WHERE sls_grp_cd = 'IS'
AND sales_vew_cd = 'S1709'
AND dat_cx_tm_prd_nr = '0'
When i use Create Temp Table - I get 720 records.
CREATE TABLE temptcompgrp_context_0 AS
SELECT *
FROM tcomgrp
WHERE sls_grp_cd = 'IS'
AND sales_vew_cd = 'S1709'
AND dat_cx_tm_prd_nr = '85'
AND svc_pvr_pyr_nr IN (SELECT svc_pvr_pyr_nr
FROM tcomgrp
WHERE sls_grp_cd = 'IS'
AND sales_vew_cd = 'S1709'
AND dat_cx_tm_prd_nr = '85'
MINUS
SELECT svc_pvr_pyr_nr
FROM tcomgrp
WHERE sls_grp_cd = 'IS'
AND sales_vew_cd = 'S1709'
AND dat_cx_tm_prd_nr = '0');
Might I also suggest that you use a Global Temporary Table.
This is a special table in Oracle that you create once and just keep reusing. Make makes them special is that only the session that inserts data into the table can see/use the data.
Once the session ends, the data automatically gets cleared.
http://docs.oracle.com/cd/E11882_01/server.112/e41084/statements_7002.htm#SQLRF54642
Create it once then insert into it:
Insert into temptcompgrp_context_0
SELECT *
...
This is a special table in Oracle that you create once and just keep reusing. Make makes them special is that only the session that inserts data into the table can see/use the data.
Once the session ends, the data automatically gets cleared.
http://docs.oracle.com/cd/E11882_01/server.112/e41084/statements_7002.htm#SQLRF54642
Create it once then insert into it:
Insert into temptcompgrp_context_0
SELECT *
...
Well usually you either do not need a temp table orthe cursor. Why is this need of this combined need?
As for the difference in the number of rows between the 2 queries, a query with MINUS is going to remove duplicates.
We don't know your data, only you do. Those 2 queries are different and I would expect that they return a different number of rows.
We don't know your data, only you do. Those 2 queries are different and I would expect that they return a different number of rows.
I need to get the missing records to a temp zone like temp table and update the dat_cx_tm_prd_nr from 85 to 0.
Thats my goal.
So i requested for three steps
1) Minus query
2) Insert into Temp Table
3) Then update the dat_cx_tm_prd_nr to 0
4) Push back to the original table : tcomgrp
5) If something goes wrong, i have to roll back the data in the tcomgrp
Thats my goal.
So i requested for three steps
1) Minus query
2) Insert into Temp Table
3) Then update the dat_cx_tm_prd_nr to 0
4) Push back to the original table : tcomgrp
5) If something goes wrong, i have to roll back the data in the tcomgrp
If I understand what you are trying to do, you don't need all those steps.
Temporary table to hold backup of information:
Then do the update of the original data from 85 to 0:
If something goes wrong, then you can just rollback the update statement and everything is back the way it was. You would also have a list of all the records you updated in the temporary table in case you need to refer back to it.
Temporary table to hold backup of information:
CREATE TABLE temptcompgrp_context_0 AS
SELECT orig_rowid,
tcomgrp.*
FROM tcomgrp
WHERE sls_grp_cd = 'IS'
AND sales_vew_cd = 'S1709'
AND dat_cx_tm_prd_nr = '85';
Then do the update of the original data from 85 to 0:
UPDATE tcomgrp
SET dat_cx_tm_prd_nr = 0
WHERE ROWID IN (SELECT orig_rowid
FROM temptcompgrp_context_0);
If something goes wrong, then you can just rollback the update statement and everything is back the way it was. You would also have a list of all the records you updated in the temporary table in case you need to refer back to it.
the requirement looks like you can do all of this in 1 single MERGE or UPDATE statement, with a inline "subquery" ...
I would say you could do it in a single statement, but it seems to me that they want to create a backup of the original rows. I don't think you could do that in a single statement. If you can, I would love to see it. This is a common task that we do, so if it can be done in one step, that would be great.
Your question indicates that you may have some SQL Server experience, and you tell us that you are: "Getting into Oracle gradually". If you do have SQL Server experience, do not assume that the way things are done in SQL Server is the best or only way to get things done in Oracle! These are very different systems! Some programming techniques that work well in SQL Server (like creating "temp" tables dynamically) are certainly *NOT* the best approach in Oracle.
If you describe the business problem you are trying to solve, we can help you with the best way to the task in Oracle.
If you describe the business problem you are trying to solve, we can help you with the best way to the task in Oracle.
Well usually you either do not need a temp table orthe cursor. Why is this need of this combined need?
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Here is your code with a cursor:
Open in new window
But, there really isn't a need for the cursor at all, you can simply do it all in one statement:Open in new window