1、oracle、db2、postgresql 使用||用来连接
select ename|| ‘work as a’ ||job as msg from emp where deptno=‘20’;
2、mysql使用concat
select concat(ename,‘work as a’ ,job) as msg from emp where deptno=‘20’;
3、sql server +
select ename +‘work as a’ +job as msg from emp where deptno=‘20’;
各种数据库的连接符
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转载自blog.csdn.net/dscfirst/article/details/86526917
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周排行