SQL查询XX天内员工的生日

SQL查询XX天内员工的生日

1. 查询一周

SELECT FullName,(dateadd(year,datediff(year,birthday,getdate()),birthday)) AS Nbirthday

FROM PMEmployeesInfo

WHERE (dateadd(year,datediff(year,birthday,getdate()),birthday)) BETWEEN getdate() AND getdate()+7

2.自定义时间段

SELECT FullName,(dateadd(year,datediff(year,birthday,getdate()),birthday))AS Nbirthday

FROM PMEmployeesInfo

WHERE

(dateadd(year,datediff(year,birthday,'2012-12-05'),birthday) BETWEEN '2012-12-05' AND '2013-01-14')

or

(dateadd(year,datediff(year,birthday,'2013-01-14'),birthday) BETWEEN '2012-12-05' AND '2013-01-14')

ORDER BY Nbirthday ASC

3 函数解释

2012-12-05是起始日期，2013-01-14是结束日期

datediff(year,birthday,getdate())这句意思是两个日期相减得到年数

dateadd(year,datediff(year,birthday,getdate()),birthday)这句意思是将birthday的年份加上相减的年数

如果birthday是1989-05-05，利用这句话得到的就是2013-05-05

自定义时间段的好处不仅仅是自定义，最重要的是解决了跨年时查询不准的情况，如想查询2012年12月20号到2013年1月20号的人员生日。

转摘自：http://blog.163.com/heaver_1989/blog/static/1846043382013010102442454/

整理： 查多少天内生日的所有信息（正数往后算，负数往前算）

SELECT GETDATE(),DATEADD(day,-40,getdate()),birthday ,(dateadd(year,datediff(year,birthday,getdate()),birthday))AS Nbirthday ,

DATEADD(year,datediff(year,birthday,DATEADD(day,-40,getdate())),birthday),

datediff(year,birthday,getdate()),DATEDIFF(year,birthday,DATEADD(day,-40,getdate()))

FROM Table

where ISNULL(birthday,'') <> ''

AND

(

--天数为正

(dateadd(year,datediff(year,birthday,getdate()),birthday)) BETWEEN GETDATE() AND DATEADD(day,-40,getdate())

OR

(dateadd(year,datediff(year,birthday,DATEADD(day,-40,getdate())),birthday)) BETWEEN GETDATE() AND DATEADD(day,-40,getdate())

OR

--天数为负

(dateadd(year,datediff(year,birthday,getdate()),birthday)) BETWEEN DATEADD(day,-40,getdate())and GETDATE()

OR

(dateadd(year,datediff(year,birthday,DATEADD(day,-40,getdate())),birthday)) BETWEEN DATEADD(day,-40,getdate()) AND GETDATE()

)