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記錄在我的數據庫是這樣的:什麼是組合日期最有效的方法?
From: 2012-01-16 06:20:00 To: 2012-01-16 06:30:00
From: 2012-01-16 06:30:00 To: 2012-01-16 06:40:00
From: 2012-01-16 06:40:00 To: 2012-01-16 06:50:00
而且我的應用程序裏面我必須將它們合併爲1點的記錄看起來像這樣:
From: 2012-01-16 06:20:00 To: 2012-01-16 06:50:00
有時記錄不以任何順序。他們可能是這樣的:
From: 2012-01-16 06:20:00 To: 2012-01-16 06:30:00
From: 2012-01-16 06:40:00 To: 2012-01-16 06:50:00
From: 2012-01-16 06:30:00 To: 2012-01-16 06:40:00
這個Timestam()?或選擇的時間? –
它是一個時間戳 – ChristoK
然後訂單必須排序 –