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解决办法:加上order by null 不让它排序
select * from emp group by empno order by null;
select * from dept, emp where dept.deptno=emp.deptno; [简单处理方式] select * from dept left join emp on dept.deptno=emp.deptno; [左外连接,更ok!]
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原文地址:http://www.cnblogs.com/ChaosJu/p/4545433.html