asc : ascending的简写,意思是升序排列,1,2,3,4,5这样
desc : desending 降序排列,5,4,3,2,1这样
select ename,sal from emp order by sal desc
如果没有写, 默认是asc
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asc : ascending的简写,意思是升序排列,1,2,3,4,5这样
desc : desending 降序排列,5,4,3,2,1这样
select ename,sal from emp order by sal desc
如果没有写, 默认是asc
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