Community Learn Tools Library Leisure
search
English
Home > Database > Mysql Tutorial > SQL优化-同SQL不同执行计划(一)_Mssql系列教程

SQL优化-同SQL不同执行计划(一)_Mssql系列教程

WBOY
Release： 2016-06-07 17:46:50
Original
1233 people have browsed it

 问题来源：CSDN Oracle技术论坛


问题        ：myepoch提出相同SQL因为检索的值，不同执行效率差别巨大。
问题环境：Oracle 10g，tbnc_adminpowerscope表在adminaccount有B树索引，
TBNC_ADMINPOWERSCOPE总记录数：33422行
TBNC_CMSARTICLE总记录数：40782行
结果      ：已经解决，优化后的SQL执行时间，均小于0.032秒
【SQL 1】：
select art.article_id, art.article_title,
Related labels：
nbsp oracle
source：php.cn
Previous article：sql多表查询语句与方法 Next article：SQL Server 2008可用性
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
1429
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
1284
PX automatic conversion to REM error  <style>html {   font-size: calc(100vw / 3.75);      }...
From 2024-04-16 09:34:16
0
0
4687
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