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我有一個包含文章記錄的表。現在我想計算源文章之間的平均時間,所以我可以自動增加或減少我的抓取時間間隔。如果我在兩個日期之間從一個源中選擇記錄,那麼用MySQL Query可以嗎?記錄之間的平均時間MySQL
表佈局:
id | title | description | create_date | source_id
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1 | Title 1 | A description | 2013-04-09 21:38:00 | 5
2 | Title 2 | A description | 2013-04-09 22:16:00 | 5
3 | Title 3 | A description | 2013-04-09 23:54:00 | 5
結果應該是:
diff between 1 and 3 = 136 min
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Average is 45,33 minutes (crawler interval: 2720 seconds)
我也能做到這一點在PHP中,如果這是更好!
試試這個: http://stackoverflow.com/questions/2237159/get-average-time-between-times-in-sql 或本: http://stackoverflow.com/questions/2237159/get-average-time-between-times-in-sql 乾杯:) – mCube 2013-04-09 21:10:32