データベースにメンバーの結婚式の日付をカウントするクエリがあります。
SELECT
SUM(NumberOfBrides) AS [Wedding Count]
, DATEPART( wk, WeddingDate) AS [Week Number]
, DATEPART( year, WeddingDate) AS [Year]
FROM MemberWeddingDates
GROUP BY DATEPART(year, WeddingDate), DATEPART(wk, WeddingDate)
ORDER BY SUM(NumberOfBrides) DESC
毎週の初めと終わりが結果セットに含まれる場合、どのように計算しますか?
SELECT
SUM(NumberOfBrides) AS [Wedding Count]
, DATEPART(wk, WeddingDate) AS [Week Number]
, DATEPART(year, WeddingDate) AS [Year]
, ??? AS WeekStart
, ??? AS WeekEnd
FROM MemberWeddingDates
GROUP BY DATEPART(year, WeddingDate), DATEPART(wk, WeddingDate)
ORDER BY SUM(NumberOfBrides) DESC
DATEFIRST
7以外に設定すると、これが壊れることを覚えておいてください。