ERROR 1093 (HY000): You can't specify target table 'test' for update in FROM clause

MySQL执行更新语句报错：

更新语句:UPDATE test SET state=50 WHERE num IN(SELECT num FROM test WHERE state=60)；

报错：ERROR 1093 (HY000): You can't specify target table 'test' for update in FROM clause

表数据：

state num
50 101
50 102
50 201
60 202
60 203

解决方式：同表不支持 update子查询结果,将子查询结果，再select一次，就可以了

改成：UPDATE test SET state=50 WHERE num IN(SELECT * FROM (SELECT num FROM test WHERE state=60))；