mysql删除重复数据

今天写了一个sql语句，功能是删除一个表中指定字段有重复的数据:

DELETE FROM test WHERE id IN (SELECT id FROM test GROUP BY id H***ING COUNT(id) > 1)

提示错误：

You can't specify target table 'test' for update in FROM clause

网上查了下原因：mysql中不能先select出同一表中的某些值，再update这个表(在同一语句中)

其实小小的修改一下就能实现这样的功能，修改后sql语句：

DELETE FROM test WHERE id IN (SELECT a.id FROM (SELECT id FROM test GROUP BY id H***ING COUNT(id) > 1) AS a)