836
834
insert t1 values (1, "aaa", "bbb"), (NULL, "", "ccccc"), (0, NULL, "");
837
835
insert t2 select * from t1;
838
836
insert t3 select * from t1;
837
checksum table t1, t2, t3, t4;
838
checksum table t1, t2, t3, t4;
839
checksum table t1, t2, t3, t4;