--sql server 獲取上週幾和本週幾
--@@datefirst 每週以周幾開始，周一是 1 ，週日是 7 ，有些機器預設是7，有些機器預設是1
select
@@datefirst
--修改 @@datefirst 的值
set datefirst 7
--查詢當前每週是以周幾開始，今天是一周的第幾天
select
@@datefirstas'
startday
', datepart(dw,getdate()) as
'weekday'--
通過 weekday 和 @@datefirst 聯合計算，抹平 @@datefirst 設定的差異
--上週
select
convert(date, dateadd(dd, -
datepart (weekday ,getdate() +
@@datefirst
-1) -
6, getdate()) ) as
'上週一',
convert(date, dateadd(dd, -
datepart (weekday ,getdate() +
@@datefirst
-1) -
5, getdate()) ) as
'上周二',
convert(date, dateadd(dd, -
datepart (weekday ,getdate() +
@@datefirst
-1) -
4, getdate()) ) as
'上周三',
convert(date, dateadd(dd, -
datepart (weekday ,getdate() +
@@datefirst
-1) -
3, getdate()) ) as
'上周四',
convert(date, dateadd(dd, -
datepart (weekday ,getdate() +
@@datefirst
-1) -
2, getdate()) ) as
'上周五',
convert(date, dateadd(dd, -
datepart (weekday ,getdate() +
@@datefirst
-1) -
1, getdate()) ) as
'上週六',
convert(date, dateadd(dd, -
datepart (weekday ,getdate() +
@@datefirst
-1) -
0, getdate()) ) as
'上週日'--
本週select
convert(date, dateadd(dd, -
datepart (weekday ,getdate() +
@@datefirst
-1) +
1, getdate()) ) as
'本周一',
convert(date, dateadd(dd, -
datepart (weekday ,getdate() +
@@datefirst
-1) +
2, getdate()) ) as
'本周二',
convert(date, dateadd(dd, -
datepart (weekday ,getdate() +
@@datefirst
-1) +
3, getdate()) ) as
'本週三',
convert(date, dateadd(dd, -
datepart (weekday ,getdate() +
@@datefirst
-1) +
4, getdate()) ) as
'本周四',
convert(date, dateadd(dd, -
datepart (weekday ,getdate() +
@@datefirst
-1) +
5, getdate()) ) as
'本周五',
convert(date, dateadd(dd, -
datepart (weekday ,getdate() +
@@datefirst
-1) +
6, getdate()) ) as
'本週六',
convert(date, dateadd(dd, -
datepart (weekday ,getdate() +
@@datefirst
-1) +
7, getdate()) ) as
'本週日
'
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