Question

我有2天

Date_from 01/03/2011 
Date_to   15/03/2011

如何从两个日期范围以上的特殊工作日（周一，周二和周五）？

我需要输出如下

Date_From   Date_To    
01/03/2011  01/03/2011  'Tuesday
04/03/2011  04/03/2011  'Friday
07/03/2011  08/03/2011  'Monday and Tuesday
11/03/2011  11/03/2011  'Friday
14/03/2011  15/03/2011  'Monday and Tuesday

Answer 1

WITH    wd (d) AS
        (
        SELECT  0
        UNION ALL
        SELECT  d + 1
        FROM    wd
        WHERE   d < 6
        )
SELECT  d.date_from,
        (
        SELECT  DATENAME(w, DATEADD(d, d, date_from))  + ' ' AS [text()]
        FROM    wd
        WHERE   DATEPART(w, DATEADD(d, d, date_from)) IN (2, 5, 6)
                AND DATEADD(d, d, date_from) <= date_to
        FOR XML PATH('')
        )
FROM    dates d

Answer 2

使用WEEKDAY或DAYOFWEEK

Answer 3

如果这是针对SQL Server执行此操作：

SELECT DATENAME(dw, GETDATE())

如何使用sql查询平日？

3 个答案: