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                請使用5.7以上版本, 5.5 會非常慢 分頁條件查詢的sql寫在子查詢中 只返回id, 在外邊根據id在手動查詢數據,這樣可以大量減少回表,提高些性能。 mysql分頁是:把當前分頁前的數據也查詢出來,然后得到當前分頁的數據,前邊的再拋棄掉。如:查詢第100頁的數據,那么mysql會把前邊的99頁和當前100頁的數據都查詢出來,然后再放棄前邊的99頁,只留下需要的第100頁面數據。 ``` 請使用5.7以上版本, 5.5 會非常慢 120萬數據情況下 使用子查詢, 先查詢到數據的id, 再查詢其他字段, 在都有索引的情況下快了 0.359 秒 SELECT * FROM sys_user WHERE id IN ( SELECT t.id FROM ( SELECT id FROM sys_user WHERE `status` = 0 ORDER BY create_time DESC, id DESC LIMIT 826163, 10 ) AS t ) ORDER BY create_time DESC, id DESC; 直接分頁 2.009秒 SELECT * FROM sys_user WHERE `status` = 0 ORDER BY create_time DESC, id DESC LIMIT 826163, 10 ```
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