高手帮忙解决下mysql的1248错误
我将oracle项目的数据库转换为mysql,部署之后执行任何SQL语句好象都会出现错误 
 2007-09-13   09:24:47,015   [org.hibernate.util.JDBCExceptionReporter]-[ERROR]   Every   derived   table   must   have   its   own   alias 
    2007-09-13   09:24:47,015   [ERROR]   org.hibernate.exception.SQLGrammarException:   could   not   execute   query   
 以下是我查找的mysql信息 
 Error:   1248   SQLSTATE:   42000   (ER_DERIVED_MUST_HAVE_ALIAS)      
 Message:   Every   derived   table   must   have   its   own   alias 
------解决方案--------------------Message: Every derived table must have its own alias   
 很明显了。 
 每个表必须有自己的别名
------解决方案--------------------()括号之后加个 AS a