8
8
INSERT INTO t1 VALUES ('A','B'),('b','A'),('C','c'),('D','E'),('a','a');
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