1181
1181
SELECT t1.id, a FROM t1 LEFT JOIN t2 ON t1.id=t2.id WHERE t2.b IS NULL;
1182
1182
id select_type table type possible_keys key key_len ref rows Extra
1183
1183
1 SIMPLE t1 ALL NULL NULL NULL NULL 5
1186
1186
SELECT t1.id, a FROM t1 LEFT JOIN t2 ON t1.id=t2.id WHERE t2.b IS NULL;