获取星期几的名称

CREATE FUNCTION [dbo].[udf_WeekDayName]
(
)
RETURNS @WeekDayName TABLE([Id] INT,[WeekDayName] NVARCHAR(15))
AS
BEGIN
INSERT INTO @WeekDayName ([Id],[WeekDayName]) VALUES (0,Saturday),(1,Sunday),(2,Monday),(3,Tuesday),(4,Wednesday),(5,Thursday),(6,Friday)
RETURN
END

CREATE FUNCTION [dbo].[udf_WeekDayNameOfDate]
(
@Date DATETIME
)
RETURNS NVARCHAR(10)
BEGIN
RETURN
CASE (DATEPART(dw, @Date) + @@DATEFIRST) % 7
WHEN 0 THEN Saturday
WHEN 1 THEN Sunday
WHEN 2 THEN Monday
WHEN 3 THEN Tuesday
WHEN 4 THEN Wednesday
WHEN 5 THEN Thursday
WHEN 6 THEN Friday
END
END