Community
Learn
Tools Library
AI Tools
Leisure
search
English
Home > Database > Mysql Tutorial > MySql查询去重操作_MySQL

MySql查询去重操作_MySQL

WBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWB
Release： 2016-06-01 13:31:18
Original
1462 people have browsed it

bitsCN.com

MySql查询去重操作

 

QString strSql = QString("SELECT DISTINCT BodyRegions FROM imagedicom WHERE PatientID = '%1'").arg(imageDicomPatientID);
Copy after login

 

 

其实mysql的或者SQL Server的去重操作很简单的，就是关键字：

 

DISTINCT。

 

根据相关要求还可以采用group by 排序或者构建一个集合来

 

显示所需要的内容，单个属性列直接使用DISTINCT自动排序。

 

bitsCN.com
source：php.cn
Previous article：mysql去除重复数据_MySQL Next article：MySQL grant语法的详细解析_MySQL
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
3
2620
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
11
2746
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
2331
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
2188
Where is the courseware about CSS mind mapping? Courseware
From 2024-04-16 10:10:18
0
0
2298
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