mysql取出指定範圍數據limit offset分析與運用

傳統寫法php

limit 偏移量,取出條數mysql

SELECT * FROM yundou_management.service_order where order_status=1 order by id asc limit 108,8 ;

mysql5以後支持新寫法,讓人更容易理解sql

limit 取出條數 offset 偏移量ide

SELECT * FROM yundou_management.service_order where order_status=1 order by id asc limit 8 offset 108 ;

假如從第一條開始獲取指定條數量,偏移量爲0優化

SELECT * FROM yundou_management.service_order where order_status=1 order by id asc limit 0,8 ;
SELECT * FROM yundou_management.service_order where order_status=1 order by id asc limit 8 offset 0 ;

也能夠簡寫成以下code

SELECT * FROM yundou_management.service_order where order_status=1 order by id asc limit 8;

隨着偏移量愈來愈大,查詢速度會愈來愈慢,解決方案在以前的文章已經介紹過。
blog

參考:mysql量級數據表的分頁優化方案get

相關文章
相關標籤/搜索