Given a datetime
, is there a way we can know it happens to be a Saturday
or Sunday
.
Any ideas and suggestions are appreciated!
This question is related to
sql-server-2008
This will get you the name of the day:
SELECT DATENAME(weekday, GETDATE())
ok i figure out :
DECLARE @dayName VARCHAR(9), @weekenda VARCHAR(9), @free INT
SET @weekenda =DATENAME(dw,GETDATE())
IF (@weekenda='Saturday' OR @weekenda='Sunday')
SET @free=1
ELSE
SET @free=0
than i use : .......... OR free=1
Attention: The other answers only work on SQL Servers with English configuration! Use SET DATEFIRST 7
to ensure DATEPART(DW, ...)
returns 1 for Sunday and 7 for Saturday.
Here's a version that is independent of the local setting and does not require to use :
CREATE FUNCTION [dbo].[fct_IsDateWeekend] ( @date DATETIME )
RETURNS BIT
AS
BEGIN
RETURN CASE WHEN DATEPART(DW, @date + @@DATEFIRST - 1) > 5 THEN 1 ELSE 0 END;
END;
If you don't want to use the function, simply use this in your SELECT statement:
CASE WHEN DATEPART(DW, YourDateTime + @@DATEFIRST - 1) > 5 THEN 'Weekend' ELSE 'Weekday' END
This expression
SELECT (((DATEPART(DW, @my_date_var) - 1 ) + @@DATEFIRST ) % 7)
will always return a number between 0 and 6 where
0 -> Sunday
1 -> Monday
2 -> Tuesday
3 -> Wednesday
4 -> Thursday
5 -> Friday
6 -> Saturday
Independently from @@DATEFIRST
So a weekend day is tested like this
SELECT (CASE
WHEN (((DATEPART(DW, @my_date_var) - 1 ) + @@DATEFIRST ) % 7) IN (0,6)
THEN 1
ELSE 0
END) AS is_weekend_day
DECLARE @dayNumber INT;
SET @dayNumber = DATEPART(DW, GETDATE());
--Sunday = 1, Saturday = 7.
IF(@dayNumber = 1 OR @dayNumber = 7)
PRINT 'Weekend';
ELSE
PRINT 'NOT Weekend';
This may generate wrong results, because the number produced by the weekday datepart depends on the value set by SET DATEFIRST. This sets the first day of the week. So another way is:
DECLARE @dayName VARCHAR(9);
SET @dayName = DATEName(DW, GETDATE());
IF(@dayName = 'Saturday' OR @dayName = 'Sunday')
PRINT 'Weekend';
ELSE
PRINT 'NOT Weekend';
SELECT DATENAME(weekday, GetDate())
Check this for sql server: http://msdn.microsoft.com/en-US/library/ms174395(v=sql.90).aspx Check this for .net: http://msdn.microsoft.com/en-us/library/bb762911.aspx
Source: Stackoverflow.com