Question

I want write this sql select statment in mysql v 3.23

select * 
    from radacct 
    where username in ( 
        select username 
            from radcheck 
            where Attribute = 'max-weekly-session'
    );

but say

ERROR 1064: You have an error in your SQL syntax near 
'select username from radcheck where Attribute= 'max-weekly-session')' 
at line 1

in mysql v 5 this is ok but how can I do in v 3.23?

Answer 1

nested selects are not available in MySQL version < 4.1

following will work

select radacct.* 
from radacct inner join radcheck on radacct.username = radcheck.username 
where radcheck.Attribute= 'max-weekly-session'