简体中文(ZH-CN) English(EN) 繁体中文(ZH-TW) 日本語(JA) 한국어(KO) Melayu(MS) Français(FR) Deutsch(DE)
Home > Backend Development > PHP Tutorial > body text

请问一个mysql索引的有关问题

WBOY
Release： 2016-06-13 13:37:47
Original
747 people have browsed it

请教一个mysql索引的问题
使用联合主健
PRIMARY KEY (`aid`,`bid`)
关于bid的索引需要重新建一个吗？

------解决方案--------------------
和联合索引一样的，要看你的数据查询条件

如果需要仅根据bid找出数据，一般还是要建的，，，看情况，看数据规模，查询条件
------解决方案--------------------
需要重新建一个

Related labels：
key mysql
source：php.cn
Previous article： 请教下 日pv 300W 基本都是动态的php 需要多少前端服务器 Next article： 如何用php把查询出来的文件导出成excel表格的形式呢
Statement of this Website
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn
Latest Articles by Author
Latest Issues
function_exists() cannot determine the custom function Function test () {return true;} if (function_exists ('test')) {echo "test is function...
From 2024-04-29 11:01:01
0
2
1522
How to display the mobile version of Google Chrome Hello teacher, how can I change Google Chrome into a mobile version?
From 2024-04-23 00:22:19
0
10
1682
The child window operates the parent window, but the output does not respond. The first two sentences are executable, but the last sentence cannot be implemented.
From 2024-04-19 15:37:47
0
1
1430
There is no output in the parent window document.onclick = function(){ window.opener.document.write('I am the output of the child ...
From 2024-04-18 23:52:34
0
1
1355
Where is the courseware about CSS mind mapping? Courseware
From 2024-04-16 10:10:18
0
0
1405
Related Topics
More>
Popular Recommendations
Popular Tutorials
More>
Related Tutorials
Popular Recommendations
Latest courses
Latest Downloads
More>
Web Effects
Website Source Code
Website Materials
Front End Template
About us Disclaimer Sitemap
php.cn：Public welfare online PHP training，Help PHP learners grow quickly！