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MySQL大数据量快速分页实现_MySQL

Jun 01, 2016 pm 01:26 PM

bitsCN.com

一般刚开始学SQL语句的时候,会这样写

代码如下: 
 
SELECT * FROM table ORDER BY id LIMIT 1000, 10;

但在数据达到百万级的时候,这样写会慢死

代码如下: 
 
SELECT * FROM table ORDER BY id LIMIT 1000000, 10;

也许耗费几十秒

网上很多优化的方法是这样的

代码如下: 
 
SELECT * FROM table WHERE id >= (SELECT id FROM table LIMIT 1000000, 1) LIMIT 10;

是的,速度提升到0.x秒了,看样子还行了 
可是,还不是完美的!

以下这句才是完美的!

代码如下: 
 
SELECT * FROM table WHERE id BETWEEN 1000000 AND 1000010;

比上面那句,还要再快5至10倍

另外,如果需要查询 id 不是连续的一段,最佳的方法就是先找出 id ,然后用 in 查询

代码如下: 
 
SELECT * FROM table WHERE id IN(10000, 100000, 1000000...);

 

来源:http://www.aichengxu.com/article/MySQL/1093_10.html

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