最小和最大日期 - 分組排

Question

我有一個表「A」作爲圖像中，我需要創建一個視圖來組的數據作爲表「B」。 有什麼建議嗎？我欣賞每一個輸入來提高我的技能 感謝

table

Answer 1

這應做到：

SELECT [USER], 
     [ACTIVITY], 
     MIN([HOUR]) AS [START], 
     MAX([HOUR]) AS [END], 
     RIGHT('0'+CAST(DATEDIFF(SECOND, CAST(MIN([HOUR]) AS TIME), CAST(MAX([HOUR]) AS TIME))/3600 AS VARCHAR), 2)+':'+RIGHT('0'+CAST((DATEDIFF(SECOND, CAST(MIN([HOUR]) AS TIME), CAST(MAX([HOUR]) AS TIME))/60) % 60 AS VARCHAR), 2) AS [MINUTE] 
FROM TAB_A 
GROUP BY [USER], 
     [ACTIVITY];