作业帮英语翻译select * from a order by decode(a.xx,50,1,-1)desc
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英语翻译select * from a order by decode(a.xx,50,1,-1)desc
英语翻译
select * from a order by decode(a.xx,50,1,-1)desc
英语翻译select * from a order by decode(a.xx,50,1,-1)desc
decode(a.xx,50,1,-1)是判断a.xx是否等于50,如果等于50,该函数取值为1,否则取值为-1.根据此函数的值进行倒序排列后,会优先显示值为1(也就是a.xx==50)的记录.
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英语翻译select * from a order by decode(a.xx,50,1,-1)desc
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