9
9
select * from t1,t1 as t2;
36
36
explain select t1.*,t2.* from t1,t1 as t2 where t1.A=t2.B;
37
37
id select_type table type possible_keys key key_len ref rows Extra
38
38
1 SIMPLE t1 ALL a NULL NULL NULL 5
40
40
select t1.*,t2.* from t1,t1 as t2 where t1.A=t2.B order by binary t1.a,t2.a;