目录

MS Access DateDiff() 函数

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示例

返回两个日期之间的差异（以年为单位）：

SELECT DateDiff("yyyy", #13/01/1998#, #09/05/2017#);

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定义和用法

DateDiff() 函数返回两个日期之间的差异。

语法

DateDiff( datepart, date1, date2, firstdayofweek, firstweekofyear)

参数值

Parameter	Description
datepart	Required. The part to return. Can be one of the following values: yyyy = Year q = Quarter m = month y = Day of the year d = Day w = Weekday ww = Week h = hour n = Minute s = Second
date1 and date2	Required. The two dates to calculate the difference between
firstdayofweek	Optional. Specifies the first day of the week. Can be one of the following values: 0 = Use the NLS API setting 1 = Sunday (this is default) 2 = Monday 3 = Tuesday 4 = Wednesday 5 = Thursday 6 = Friday 7 = Saturday
firstdayofyear	Optional. Specifies the first week of the year. Can be one of the following values: 0 = Use the NLS API setting 1 = Use the first week that includes Jan 1st (default) 2 = Use the first week in the year that has at least 4 days 3 = Use the first full week of the year

技术细节

工作于：	从 Access 2000

更多示例

示例

返回两个日期之间的差异（以月为单位）：

SELECT DateDiff("m", #13/01/1998#, #09/05/2017#);

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示例

返回指定日期与今天日期之间的差异（以天为单位）：

SELECT DateDiff("d", #13/01/1998#, Date());

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