573
573
create table t3 (a ENUM('Yes', 'No') NOT NULL);
574
574
create table t4 (a ENUM('aaa', 'bbb') NOT NULL);
575
575
insert into t3 values (1);
577
577
insert into t4 values (3);
578
578
select "1" as a union select a from t1;
579
579
select a as a from t1 union select "1";