Updating columns from second table in Oracle master table via procedure - oracle

Question

I have created a stored procedure where I want to update my master table columns from relevant table.
So below is my SP
CREATE OR REPLACE PROCEDURE UPD_RRSOC_MST_COLUMNS AS
BEGIN
MERGE
INTO TBL_RRSOC_STORE_INFO trg
USING (
SELECT t1.SLP_STATE_HEAD, T2.STATE_HEAD_NAME
FROM TBL_RRSOC_STORE_INFO t1
JOIN TBL_STATE_HEAD_INFO t2
ON TBL_RRSOC_STORE_INFO.SLP_STATE_HEAD = TBL_STATE_HEAD_INFO.STATE_HEAD_NAME
-- WHERE TBL_RRSOC_STORE_INFO.UPDATETYPE='blah'
) src
ON (trg.RRSOC_ID = t2.ID)
WHEN MATCHED THEN UPDATE
SET TBL_RRSOC_STORE_INFO.SLP_STATE_HEAD = STATE_HEAD_NAME;
NULL;
END UPD_RRSOC_MST_COLUMNS;
but I am getting error as
Error(10,55): PL/SQL: ORA-00904: "TBL_STATE_HEAD_INFO"."STATE_HEAD_NAME": invalid identifier
How can I create the procedure?
Update
MERGE INTO TBL_RRSOC_STORE_INFO trg
USING (
SELECT t1.SLP_STATE_HEAD,
T2.STATE_HEAD_NAME,
t2.id,
t2.STATE_MOB_NUM
FROM TBL_RRSOC_STORE_INFO t1
JOIN TBL_STATE_HEAD_INFO t2
ON t1.SLP_STATE_HEAD = t2.STATE_HEAD_NAME
) src
ON (trg.RRSOC_ID = src.ID)
WHEN MATCHED THEN UPDATE
SET SLP_STATE_HEAD = src.STATE_HEAD_NAME,
SLP_STATE_HEAD_NO = src.STATE_MOB_NUM;

Answer 1

Use the aliases in the join condition rather than the full table names:
SELECT t1.SLP_STATE_HEAD, T2.STATE_HEAD_NAME
FROM TBL_RRSOC_STORE_INFO t1
JOIN TBL_STATE_HEAD_INFO t2
ON t1.SLP_STATE_HEAD = t2.STATE_HEAD_NAME
Then:
MERGE
INTO TBL_RRSOC_STORE_INFO trg
USING (...) src
ON (trg.RRSOC_ID = t2.ID)
Will fail as you do not have an alias in the MERGE scope called t2 you have the aliases trg and src and src does not have an id column as it is not one of the columns you are SELECTing.
Then:
WHEN MATCHED THEN UPDATE
SET SLP_STATE_HEAD = src.STATE_HEAD_NAME;
You do not need an alias for the table being updated (it can only be trg) but you probably want an alias on the column you are updating from.
Which would give you something like:
MERGE INTO TBL_RRSOC_STORE_INFO trg
USING (
SELECT t1.SLP_STATE_HEAD,
T2.STATE_HEAD_NAME,
t2.id
FROM TBL_RRSOC_STORE_INFO t1
JOIN TBL_STATE_HEAD_INFO t2
ON t1.SLP_STATE_HEAD = t2.STATE_HEAD_NAME
) src
ON (trg.RRSOC_ID = src.ID)
WHEN MATCHED THEN UPDATE
SET SLP_STATE_HEAD = src.STATE_HEAD_NAME;