doubt about the update

Hi all

Three statements to update, I need to run on a single table.
Is there a way I can update instructions executed all three in a single statement?
    UPDATE xxops_forecast_extract b SET territory_id = (SELECT a.territory_id
         FROM fdev_hier_node_mv a
         WHERE a.shr_node_id = b.shr_node_id
          AND NVL(end_dt,SYSDATE) > SYSDATE) ;
    COMMIT;

    UPDATE xxops_forecast_extract b SET position_id = (SELECT a.row_id
        FROM s_postn a
        WHERE a.name = 'TD-'||UPPER(b.am_id))
        WHERE position_level = 7
        AND b.am_id IS NOT NULL;
    COMMIT;
  
    UPDATE xxops_forecast_extract b SET position_id = (SELECT a.row_id
        FROM s_postn a
        WHERE UPPER(a.desc_text) = UPPER(TRIM(B.POSITION_NAME)))
        WHERE position_level = 7
        AND b.am_id IS NULL;
 Below are the sample data for the tables. 

 xxops_forecast_extract 
 shr_node_id am_id position_name  position_id  territory_id
 2231211     Dave     (null)        (null)       (null)
 2231211     Michele  (null)        (null)       (null)
 2231211     (null)   COMM WEST 230 (null)       (null)
 2231211     (null)   COMM ISAM 110 (null)       (null)

 fdev_hier_node_mv
 shr_node_id territory_id 
  2231211      5694


 s_postn
 row_id    name       desc_text
 12122   TD-Dave     (null)
 12123   TD-Michele  (null)
 89381   (null)          COMM WEST 230
 89382   (null)          COMM ISAM 110

 Resulting table after update

 xxops_forecast_extract 
 shr_node_id am_id position_name  position_id  territory_id
 2231211     Dave     (null)        12122       5694
 2231211     Michele  (null)        12123       5694
 2231211     (null)   COMM WEST 230 89381       5694
 2231211     (null)   COMM ISAM 110 89382       5694
Thank you all.

Hello

You can combine the statements by combining subqueries.
No logic not apply to all the the original updates must be out of the WHERE clause and put in a CASE statement.
The CASE statements should "update" column to itself if none of the conditions apply.

For example, your final two statements UPDATE, that have subqueries on s_postn, both can be combined like this:

UPDATE     xxops_forecast_extract     b
SET     position_id =
     (
     SELECT     CASE
               WHEN     (     b.am_id          IS NOT NULL
                    AND     UPPER (a.name)     = 'TD-' || UPPER (b.am_id)
                    )
               OR     (     b.am_id          IS NULL
                    AND     UPPER (a.desc_text)     = UPPER (TRIM (b.position_name))
                    )
               THEN     a.row_id
               ELSE     b.position_id
          END
     FROM     s_postn     a
        WHERE     UPPER (a.name)          = 'TD-' || UPPER (b.am_id)
     OR     UPPER (a.desc_text)     = UPPER (TRIM (b.position_name))
     )
;

There seems to be some mistakes in the statemnts UPDATE that you posted. For example, the last two refer to a column called position_level that does not exist in the other table.
The above statement produces the results you want with the data you've posted.

As you can see, the code is much harder to understand, debug and maintain.
If the performance gain (if any) justifies the addional complexity is debatable in this case.
I'm sure that combining all three queries would be useful.

Consider using the MERGE: it is sometimes easier to use, even if, as in this case, you're never insert.

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