pageHelper plug large amounts of data query efficiency

Original Bowen address: https: //blog.csdn.net/baidu_38083619/article/details/82463058

Summary: pageHelper limit is achieved by splicing sql pagination

Inefficient query: select * from user where age = 10 limit 100000,10;

High efficiency query:

SELECT a.* FROM USER a
INNER JOIN 
    (SELECT id FROM USER WHERE age = 10 LIMIT 100000,10) b 
ON a.id = b.id;