SQL Server的Datediff和Access的Datediff的区别

SQL Server的Datediff和Access的Datediff的区别

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What function does: returns a variant to reflect the time difference between two dates

Syntax: DateDiff( inteval, firstdate, seconddate [,firstweekday[ [ , firstweek])

Example

The following shods the difference in days between two dates:

= DateDiff("d", "11-05-2002", "11-07-2002") returns 2

The following table lists the valid time periods and their interval values.

Time Interval Syntax
Year
yyyy

Quarter
q

Month
m

Day of year
y

Day
d

Weekday
w

Week
ww

Hour
h

Minute
n

Second
s

Note: Take special care for "ww" vs "w." "WW" is for a week.

AgeYrs: DateDiff("d",[INSERVICE],Now())/365
Gives me this result:

14.5972602739726

in SQL the function:

AgeYrs = DATEDIFF(d,INSERVICE,getdate())/365

其实就是"需要注意！