desc是降序; asc是升序
默认:查询
加上 order by [列名] [方法]
如:升序
select sid from t_s order by sid asc;

降序:
select sid from t_s order by sid desc;

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desc是降序; asc是升序
默认:查询
加上 order by [列名] [方法]
如:升序
select sid from t_s order by sid asc;

降序:
select sid from t_s order by sid desc;
