69 lines
1.6 KiB
SQL
69 lines
1.6 KiB
SQL
-- =====================================================
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-- 初始化 SignUp 表的序號 (SeqNo)
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-- 用途：為現有的參加人員記錄補充序號
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-- 說明：按活動(CourseID)和ID排序，為每個活動內的參加人員自動編號
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-- =====================================================
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-- 方式一：使用 ROW_NUMBER() - 推薦（支援 SQL Server 2005+）
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-- 此方式會為每個活動內的記錄按 ID 順序編號
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BEGIN TRANSACTION;
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UPDATE SignUp
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SET SeqNo = rn.RowNum
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FROM SignUp su
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INNER JOIN (
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SELECT
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ID,
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ROW_NUMBER() OVER (PARTITION BY CourseID ORDER BY ID ASC) AS RowNum
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FROM SignUp
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) rn ON su.ID = rn.ID
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WHERE su.SeqNo = 0 OR su.SeqNo IS NULL;
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-- 顯示更新結果
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SELECT '序號更新完成' AS [操作結果];
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SELECT CourseID, COUNT(*) AS [人數], MIN(SeqNo) AS [最小序號], MAX(SeqNo) AS [最大序號]
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FROM SignUp
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WHERE SeqNo > 0
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GROUP BY CourseID
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ORDER BY CourseID;
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COMMIT TRANSACTION;
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-- =====================================================
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-- 驗證結果
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-- =====================================================
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-- 查看更新後的資料
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SELECT
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ID,
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CourseID,
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SeqNo,
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Name,
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Mobile,
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CheckInTime,
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CheckOutTime
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FROM SignUp
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ORDER BY CourseID ASC, SeqNo ASC;
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-- 檢查是否有未設定序號的記錄
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SELECT
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ID,
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CourseID,
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Name,
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Mobile
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FROM SignUp
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WHERE SeqNo = 0 OR SeqNo IS NULL
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ORDER BY CourseID, ID;
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-- 檢查序號是否重複
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SELECT
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CourseID,
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SeqNo,
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COUNT(*) AS [重複次數]
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FROM SignUp
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WHERE SeqNo > 0
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GROUP BY CourseID, SeqNo
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HAVING COUNT(*) > 1
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ORDER BY CourseID, SeqNo;
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