以 c 中减去字母
原文：subtracting letters in c
原文：subtracting letters in c
我想知道在C中如何“减号”:我的意思是,我有两个字母,一个字母和C字母,我想执行C - a=b=3-1=2。 C中怎么可能得到同样的行为?我可以...
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矿石中回收的微粒数据
原文：Subtracting timestamp in oracle returning weird data
原文：Subtracting timestamp in oracle returning weird data
I m trying to subtract two dates and expecting some floating values return. But what I got in return is as below: +000000000 00:00:07.225000 Multiplying the value by 86400 (I want to get the ...
检查在减员之前是否存在变数的最佳方式?
原文：Best way to check if variable exists before subtraction?
原文：Best way to check if variable exists before subtraction?
我有一个变量,例如共计1美元。 数据库具有价值,例如6。
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