mysql 分页性能优化

最简单的分页方法是这样的

select * from exarticletemp ORDER BY CreateDate desc LIMIT 10000,10

该表中存在5w左右数据

执行时间平均在10s左右，因此该种方式在数据量大的情况下查询效率极低。

优化方式有以下几种

1.此种方式平均在7-8s之间（CreateDate 需建立索引）

select * from exarticletemp where id> (SELECT id FROM exarticletemp ORDER BY CreateDate DESC LIMIT 10000,1)  ORDER BY CreateDate desc LIMIT 20

2.此种方式大概平均在0.01s

SELECT * FROM exarticletemp WHERE id BETWEEN 10000 AND 10020;

3.低于0.01s

select * from exarticletemp where id in(10109,10110,10111,10112,10113,10114,10115,10116,10117,10118,10119,10120,10121,10122,10123,10124,10125,10126,10127,10128,10129,10130)

4.低于1s

select B.* from (select Id from exarticletemp ORDER BY CreateDate LIMIT 20000,20) as A LEFT join exarticletemp B on A.Id =B.Id