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  • MySQL DATEDIFF 函数
    Summary: in this tutorial, you will learn how to use the MySQL DATEDIFF function to calculate the number of days between two date values.MySQL DATEDIFF function syntaxMySQL DATEDIFF function calculate the number of days between two DATE, DATETIME, or TIMESTAMP values. The DATEDIFF function is useful in many cases e.g., you can calculate an interval in days that the products need to ship to a customer.The sy
  • hive计算日期差函数datediff,hive修改日期连接符
    本文主要讲述怎样用hive计算日期差问题。首先,hive本身有一个UDF,名字是datediff。我们来看一下这个日期差计算的官方描述,(下面这个是怎么出来的):hive> desc function extended datediff;     //*查函数功能*// OK datediff(date1, date2) - Returns the number of days between date1 and date2 date1 and date2 are strings in the format 'yyyy-MM-dd HH:mm:ss' or 'yyyy-MM
  • 存储过程中用到的年,月,周的函数
    存储过程中用到的年,月,周的函数2007-06-01 09:13周:Dateadd(wk,datediff(wk,0,getdate()),-1) Dateadd(wk,datediff(wk,0,getdate()),6) 月:Dateadd(mm,datediff(mm,0,getdate()),0) Dateadd(ms,-3,dateadd(mm,datediff(m,0,getdate())+1,0)) 年:Dateadd(yy,datediff(yy,0,getdate()),0) Dateadd(ms,-3,DATEADD(yy, DATEDIFF(yy,0,getdate())+1, 0)) 注:上面的SQL代码只是一个时间段 例: 下面的SQL的条件部分,就是查询时间段在本周范围内的: Where Time BETWEEN Dateadd(wk,datediff(wk,0,getdate()),-1) AND Dateadd(wk,datediff(wk,0,getdate()),6) s
  • 探讨如何计算age的sql函数
               复制代码 代码如下:ALTER FUNCTION [dbo].[get_FullAge](  @birthday datetime, @currentDay datetime)RETURNS INTASBEGINDECLARE @age INTSET @age = DATEDIFF(YEAR, @birthday, @currentDay)IF DATEDIFF(DAY, DATEADD(YEAR, @age, @birthday), @currentDay) <= 0 SET @age = @age - 1IF DATEPART(MONTH, @birthday) = 2 AND DATEPART(DAY, @birthday) = 29 AND DATEPART(MONTH, @currentDay) = 3 AND DATEPART(DAY, @currentDay) = 1 AND

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