Mysql的order by + limit性能优化

时间 2020-02-12 标签 mysql order limit 性能优化

Mysql的order by + limit性能优化：sql

原sql语句以下，在大数据量下（几百上千万），性能很是糟糕。性能优化

SELECT *
FROM   products
ORDER  BY date
LIMIT  0, 10;
性能

改成以下：

SELECT *
FROM   products
JOIN (SELECT id
      FROM   products
      ORDER  BY date
      ) AS t ON t.id = products.id大数据

LIMIT 0, 10;
优化