摘要： Declare @d DatetimeSet @d=getdate()SELECT Top 1* FROM [user_info] WHERE 0.01 >= CAST(CHECKSUM(NEWID(), [id]) & 0x7fffffff AS float) / CAST (0x7fffffff AS int)Select [语句执行花费时间(毫秒)] = Datediff(ms,@d,Getdate()) 阅读全文