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之前做过SharePoint list 日期计算列，不过忘了将公式记录下来，当重新用到的时候花了好大力气来找，特此记录
根据日期字段可以求当前周，当前月，当前日
Activity Date 为日期，则
Day
Month
Week =INT(([Start Date]-DATE(YEAR([Start Date]),1,1) (TEXT(WEEKDAY(DATE(YEAR([Start Date]),1,1)),"d")))/7) 1
还有一些其他的，慢慢研究，先专贴出来分享
Get Week of the year
=DATE(YEAR([Start Time]),MONTH([Start Time]),DAY([Start Time])) 0.5-WEEKDAY(DATE(YEAR([Start Time]),MONTH([Start
Time]),DAY([Start Time])),2) 1
First day of the week for a given date:
=[Start Date]-WEEKDAY([Start Date]) 1
Last day of the week for a given date:
=[End Date] 7-WEEKDAY([End Date])
First day of the month for a given date:
=DATEVALUE(“1/”&MONTH([Start Date])&”/”&YEAR([Start Date]))
Last day of the month for a given year (does not handle Feb 29). Result is in date format:
=DATEVALUE (CHOOSE(MONTH([End Date]),31,28,31,30,31,30,31,31,30,31,30,31) &”/” & MONTH([End Date])&”/”&YEAR([End
Date]))
Day Name of the week : e.g Monday, Mon
=TEXT(WEEKDAY([Start Date]), “dddd”)
=TEXT(WEEKDAY([Start Date]), “ddd”)
The name of the month for a given date – numbered for sorting – e.g. 01. January:
=CHOOSE(MONTH([Date Created]),”01. January”, “02. February”, “03. March”, “04. April”, “05. May” , “06. June” , “07. July” ,
“08. August” , “09. September” , “10. October” , “11. November” , “12. December”)
Get Hours difference between two Date-Time :
=IF(NOT(ISBLANK([End Time])),([End Time]-[Start Time])*24,0)
Date Difference in days – Hours – Min format : e.g 4days 5hours 10min :
=YEAR(Today)-YEAR(Created)-IF(OR(MONTH(Today)<MONTH(Created),AND(MONTH(Today)=MONTH(Created),
DAY(Today)<DAY(Created))),1,0)&” years, “&MONTH(Today)-MONTH(Created) IF(AND(MONTH(Today)
<=MONTH(Created),DAY(Today)<DAY(Created)),11,IF(AND(MONTH(Today)<MONTH(Created),DAY(Today)
>=DAY(Created)),12,IF(AND(MONTH(Today)>MONTH(Created),DAY(Today)<DAY(Created)),-1)))&” months,
“&Today-DATE(YEAR(Today),MONTH(Today)-IF(DAY(Today)<DAY(Created),1,0),DAY(Created))&” days”