mysql查一張表有哪些索引

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可以用這個命令：

 show index from table_name;

得到輸出：

+------------------+------------+------------+--------------+-------------+-----------+-------------+----------+--------+------+------------+---------+---------------+| Table            | Non_unique | Key_name   | Seq_in_index | Column_name | Collation | Cardinality | Sub_part | Packed | Null | Index_type | Comment | Index_comment |+------------------+------------+------------+--------------+-------------+-----------+-------------+----------+--------+------+------------+---------+---------------+| table_name |          0 | PRIMARY    |            1 | id          | A         |      661757 |     NULL | NULL   |      | BTREE      |         |               || table_name |          0 | product_id |            1 | product_id  | A         |      661757 |     NULL | NULL   |      | BTREE      |         |               |+------------------+------------+------------+--------------+-------------+-----------+-------------+----------+--------+------+------------+---------+---------------+2 rows in set (0.00 sec)

 

mysql查一張表有哪些索引