Hi,

I just want to list the data in a 8 variable column whose specifications should be first three variabe must be a character and next five variables must be numeric. For example if the column name is USER_ID and i want to list the values having the data like 'AAANNNN'(ABC12345).

Can some one help me to sort this out?

I used the code like

select * from tablename where substr(USER_ID,1,3) is alpha and substr(USER_ID,4,5) is number

but no use, these functions are not available.

functions are not available. ??
select * from tab where substr(col,1,1)='x' and substr(col,4,5)='x'
for substr which is a character based function you can not specify numbers
check the doc
SUBSTR