# # Test of unions # drop table if exists t1,t2; CREATE TABLE t1 (a int not null, b char (10) not null); insert into t1 values(1,"a"),(2,"b"),(3,"c"); CREATE TABLE t2 (a int not null, b char (10) not null); insert into t2 values (3,"c"),(4,"d"),(5,"e"),(6,"f"); select a,b from t1 union select a,b from t2; select a,b from t1 union all select a,b from t2; drop table t1,t2;