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About CAST function in oracle

1035909Aug 27 2013 — edited Aug 28 2013

Hi ,

Now iam migrating my system from SQL to ORACLE 9i.

Here USERID is of NUMBER(38) type
  and DATA is of LONG type in SQL.

I  have table named :

     PEOPLE  and DBATABLE and i run the following code in oracle but found the following error...

ORA-00932: inconsistent datatypes:

SELECT P.USERID FROM PEOPLE P LEFT OUTER JOIN (SELECT DATA  FROM DBATABLE WHERE NAME='USER' ) R ON CAST(DATA  AS VARCHAR(50))= CAST(P.USERID AS VARCHAR(50)) WHERE P.USERLOGID= 1000 AND R.DATA IS NULL;

So help me for finding my error.
I have missed somewhere but could not find what i missed .

Plz help me out.
With regards,
Namus
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Locked on Sep 25 2013
Added on Aug 27 2013
#9i, #database, #dba, #error, #oracle, #query, #sql, #sql-developer, #sqlplus, #windows
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