Oracle的并行查询是使用多个操作系统级别的Server Process来同时完成一个SQL查询，本文讲解Oracle数据库并行查询出错的解决方法如下：
1、错误描述
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ORA-12801: 并行查询服务器P007中发出错误信号
ORA-01722:无效数字
12801.00000 -"error signaled in parallel query server %s"
*Cause: A parallel query server reached an exception condition.
*Action: Check the following error message for the cause,and consult your error manual for the appropriate action.
*Comment: This error can be turned off with event 10397,in which case the server's actual error is signaled instead.
