如何删除 MS SQL 数据库中最早的一周(期间)?

How to delete oldest week(period) in MS SQL database?

MS SQL 2008R2 Express,我有数据库 - 一个 table 有行。当 db 大小变成大约 10gb 时,我需要在这个 table 中清理最早的一周(我不知道日期)。你能帮我写剧本吗?谢谢

UPD1。 有 DateAndTime 列,所以我在 VBA:

中进行这样的查询
strSQL = "SELECT DateAndTime
                ,TagName
                ,Val
                ,SetPoint
                ,Limit_H
                ,Limit_L
                ,Result 
          FROM dbo.Statistic 
          WHERE DateAndTime  BETWEEN CAST('" & TimeBegin & "' AS datetime) AND CAST( '" & TimeEnd & " ' AS datetime) 
          Order By DateAndTime desc , (CASE WHEN ISNUMERIC(TagName)=1 THEN CAST(CAST(TagName AS float) AS INT)END ) desc"

这个怎么样 -

DELETE YOUR_TABLE
WHERE DATE_COL BETWEEN (SELECT MIN(DATE) FROM YOUR_TABLE) AND (SELECT MIN(DATE) FROM YOUR_TABLE) + 7

按照 Ankit 的建议,使用日期的 min() 并添加一周

delete 
from dbo.statistic
where dateandtime between min(dateandtime) 
                    and dateadd(week, 1, min(dateandtime))