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我有一个包含文章记录的表。现在我想计算源文章之间的平均时间,所以我可以自动增加或减少我的抓取时间间隔。如果我在两个日期之间从一个源中选择记录,那么用MySQL Query可以吗?记录之间的平均时间MySQL
表布局:
id | title | description | create_date | source_id
-----------------------------------------------------------------
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
结果应该是:
diff between 1 and 3 = 136 min
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Average is 45,33 minutes (crawler interval: 2720 seconds)
我也能做到这一点在PHP中,如果这是更好!
试试这个: 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 干杯:) – mCube 2013-04-09 21:10:32