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FLOOR Round towards minus infinity. FLOOR(X) rounds the elements of X to the nearest integers towards minus infinity. CEIL Round towards plus infinity 阅读全文
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any: any=1,有一个元素是1,即可; any=0,全部元素为0,即可。 all: all=1,全部元素是1,即可; all=0,有一个元素是0,即可。 ALL True if all elements of a vector are nonzero. ANY True if any elem 阅读全文
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使用SqlServer 2015的过程中,会出现如下情况:在修改完表字段名或是类型后点击保存时会弹出一个对话框,且无法保存已做的修改。对话框内容大致如下:Saving changes is not permitted. The changes you have made require the fo... 阅读全文