修剪週一至MON使用SQL

Question

這個SELECT語句顯示如果日期是星期一，星期二等等。

Select DATENAME(dw, CAST([DateTime] as Date)) as DayName 

我想要做的是這個詞週一修剪成周一或週二至下週二纔可能？

Answer 1

請嘗試：

Select UPPER(LEFT(DATENAME(dw, CAST([DateTime] as Date)), 3)) as DayName 

Answer 2

這將讓一天名稱的前3個字母：

Select LEFT(DATENAME(dw, CAST([DateTime] as Date)),3) as DayName 

Answer 3

您可以使用SUBSTRING：

SELECT SUBSTRING (DATENAME(dw,CAST([DateTime] as Date)),3 ,0 , 4) as DayName 

Answer 4

只是一味

Select LEFT(DATENAME(dw,CAST([DateTime] as Date)),3) as DayName 

Answer 5

這裏是例子。

SELECT 

DATENAME(dw,'09/23/2013') as theDayName ,  

LEFT(DATENAME(MONTH,getdate()),3) AS [Short Month Name] 

http://raresql.com/2013/05/23/sql-server-how-to-get-short-month-name-weekday-name-from-datetime/

輸出

theDayName Short Month Name 
Monday  Jun 

Answer 6

DECLARE @D VARCHAR(10)= '06/09/2014' 
SELECT UPPER(SUBSTRING(DATENAME(dw,@D),1,3)) as theDayName 
SELECT UPPER(LEFT(DATENAME(dw,@D),3)) as theDayName