Datatype conversion in IBM DB2: BIGINT to VARCHAR
db2, sql, udb
Solution
Okay, I found a method:
select CORR_ID from TABLE1 where CORR_ID not in
(select CAST( CAST(id AS CHAR(50)) AS VARCHAR(50) ) from TABLE2)
This is pretty intriguing: You can't cast a BIGINT to VARCHAR, but:
- you can cast a BIGINT to CHAR
- and you can cast a CHAR TO VARCHAR
this is ridiculous!
Problem
I'm writing a query to do some stuff. But its not working the way I want it to: ``` select CORR_ID from TABLE1 where CORR_ID not in (select id from TABLE2) ``` The problem is, TABLE2.id is a long, while TABLE1.CORR_ID is a string. So how can I make it work? PS: I'm using IBM UDB.