主题：[求助]SQL语句怎么写日期是哪一年哪一周，及本周是从几号到几号

你想加入条件？看红色代码

cmd.Comma ndText = "Sele ct DatePart(yyyy, 下单日期) AS 年,DatePart(ww, 下单日期) AS 周, ( as 日期段),组别," & _
"SUM(总线数) AS 总线数 From {SG2生管订单完工情况} Where 下单日期 >= '" & kday & "' and DatePart(yyyy, 下单日期) = 2017 GROUP BY " & _
"DatePart(yyyy, 下单日期),DatePart(ww, 下单日期),组别 ORDER BY DatePart(yyyy, 下单日期),DatePart(ww, 下单日期),组别"

datePart的周数的计算，是从周日到周六为一周，不是从周一开始的。如果要用周日开始，要这样 http://www.cnblogs.com/biwork/p/3546728.html

如果你要筛选本周的数据，参考 http://www.foxtable.com/webhelp/scr/2706.htm

生成表以后，循环每一列，根据年份和周数，确定范围

Dim y As Integer = 2017
Dim w As Integer = 6
Dim start As Date = new Date(y, 1, 1)
start = start.AddDays(-start.DayOfWeek)
start = start.AddDays(7*(w-1))
msgbox(start & " - " & start.AddDays(6))