134
134
(7,7), (8,8), (9,9), (10,10), (11,11), (12,12);
135
135
explain select * from t1 where a between 2 and 3;
136
136
id select_type table type possible_keys key key_len ref rows Extra
138
138
explain select * from t1 where a between 2 and 3 or b is null;
139
139
id select_type table type possible_keys key key_len ref rows Extra