ach so, das sagt EXPLAIN:
1 PRIMARY test
ALL NULL NULL NULL NULL 1000 Using where
2 DEPENDENT SUBQUERY test
index NULL id 20 NULL 1000 Using index
ach so, das sagt EXPLAIN:
1 PRIMARY test
ALL NULL NULL NULL NULL 1000 Using where
2 DEPENDENT SUBQUERY test
index NULL id 20 NULL 1000 Using index