oracl 和db2 常用语法比较: 1、取前N条记录 Oracle:Select * from TableName where rownum <= N; DB2:Select * from TableName fetch first N rows only; 2、取得系统日期 Oracle:Select sysdate from dual; DB2:Select current timestamp from sysibm.sysdummy1; 3、空值转换 Oracle:Select
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
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.