MYSQL if a select query returns 0 rows then another select query?

Question

if select * from table where x=1 returns 0 rows, then I need select * from table where x=2 [or some other query]. Is it possible to do this in a si

Answer 1

you can use EXIST and NOT EXIST statement to check that result is null or not. if result is Null then you can get value from table2.