ora:00936 Missing Expression error

Question

I\'m getting ORA:00936 error for the following query.Please let me know the issue in the query

SELECT convert(DATE,r.created_dt) as created_dt,
r.created_dt as t         


        

Answer 1

SELECT convert(DATE,r.created_dt) as created_dt

The issue is with the incorrect use of CONVERT function. Please see the documentation.

SQL> SELECT convert(DATE,hiredate) as created_dt from emp;
SELECT convert(DATE,hiredate) as created_dt from emp
               *
ERROR at line 1:
ORA-00936: missing expression


SQL>

I guess you are trying convert the datatype, you could use TO_DATE to convert string into date. Or, TO_CHAR to do vice-versa.