How to handle Decode function?

Question

Hi All,
I am using a dynamic sql query for deletion. here is the Query
DELETE FROM t_mob WHERE EXISTS (SELECT 1 FROM temp_sal
WHERE UPPER(sm_trans) IN ('CHG') AND sm_code IS NOT NULL AND fsyb_code = sm_code)
AND (fsyb_code, fsyb_code) NOT IN (
SELECT sm_code, vds_code FROM t_ven , temp_sal
WHERE UPPER(sm_trans) IN ('CHG') AND sm_code IS NOT NULL
AND vds_code = sm_code and vds_code <>'CQ' AND vds_code = sm_code) ;
Before running the above Query i have few list as CQ/YY/TT/GG and so on and this are called as vend.
Now when i am trying to run the 2nd inner query i am getting result as YY/TT9/GG...
But when i have run the 1st ineer Query then it is displaying result as "TT" which is geeting deleted from the table.
Now the requiremnet is when evere we have TT it should not delete that record..What i have analyzed that 2nd inner loop is appending with TT9 but where as 1st one is showing as TT and hence the records is geeting deleted.
How i can append 9 to the above query so that it matches and hence it will stop deleting those records.
Hope u have understood my problem.
Thanks,
Anoo..

Answer 1

got a little lost on what is going on but if you are just trying to change a TT9 into TT a decode as you mentioned or case
should work
with t as  (select t.column_value vendor_cd  from table(sys.odcivarchar2list('YY','TT9','GC','CQ','TT')   ) t)
select vendor_cd,  decode(vendor_cd,'TT9','TT',vendor_cd) new_vendor_cd  from t;
VENDOR_CD     NEW_VENDOR_CD
YY     YY
TT9     TT
GC     GC
CQ     CQ
TT     TT