Question

I simply want to select a boolean value that indicates something like the following …

select name , age > 18 from tbl_user ;

it gives an error on the expression age > 18

Can anyone just tell me how can I add expressions in the select query …

Answer 1

select name, case when age > 18
                  then 'ok'
                  else 'not ok'
             end as age_ok
from tbl_user

Instead of ok and not ok you can use 1 and 0 for boolean values if you like