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8 lines
683 B
SQL
8 lines
683 B
SQL
EXPLAIN SELECT * FROM (SELECT 1) AS x;
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+----+-------------+------------+--------+---------------+------+---------+------+------+----------------+
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| id | select_type | table | type | possible_keys | key | key_len | ref | rows | Extra |
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+----+-------------+------------+--------+---------------+------+---------+------+------+----------------+
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| 1 | PRIMARY | <derived2> | system | NULL | NULL | NULL | NULL | 1 | |
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| 2 | DERIVED | NULL | NULL | NULL | NULL | NULL | NULL | NULL | No tables used |
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+----+-------------+------------+--------+---------------+------+---------+------+------+----------------+
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