MULã¨ã¯ - tail -f /dev/nullPRI：PRIMARY MUL：MULTIPLE mysql> desc test_table; +-------------+-------------+------+-----+---------+----------------+ | Field | Type | Null | Key | Default | Extra | +-------------+-------------+------+-----+---------+----------------+ | t_id | int(25) | NO | PRI | NULL | auto_increment | | name | varchar(48) | YES | | NULL | | | c_id | int(25) | NO | MUL | NULL | | +-------------+-------------+-
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