随笔分类 -  每日所见记录

记录每天从网上学到的点点滴滴
摘要:SqlServer当有where子句时,Sql从右向左查询,如:Select * From Employee Where Sex='m' And Age>100 比 Select * From Employee Where Age>100 and Sex='m'Sql中的执行效率高到低:exists in join将查询后的结果表整个插入表中:1、Select ... into TempTabl... 阅读全文
posted @ 2006-01-02 12:02 KiddLee 阅读(567) 评论(0) 推荐(0)
摘要:1、编辑js文件成dll,在VS的命令提示中输入 jsc/t:library class CustomEval{static function eval(strExp){return eval(strExp);}} 然后就可以在程序中引入此dll,当然还要引入Microsoft.Jscript.dllConsole.Write(CustomEval.eval("2+4*7")); Cons... 阅读全文
posted @ 2005-12-29 14:12 KiddLee 阅读(342) 评论(0) 推荐(0)