Community Learn Tools Library Leisure
search
English
Home > Database > Mysql Tutorial > sql 删除重复行(ALL或DISTINCT)

sql 删除重复行(ALL或DISTINCT)

WBOY
Release： 2016-06-07 17:50:01
Original
2095 people have browsed it

删除重复行SELECT语句中使用ALL或DISTINCT选项来显示表中符合条件的所有行或删除其中重复的数据行，默认为ALL。使用DISTINCT选项时，对于所有重复的数据行在SELECT返回的结果集合中只保留一行

Related labels：
distinct sql delete repeat
source：php.cn
Previous article：如何添加新用户到你的MySQL数据库 Next article：php调用mysql存储过程的方法
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
SQL Count() also requires 0 I have only one table and I want to count each entry of a tag that starts with 0. Now I tr...
From 2024-04-06 19:48:53
0
1
449
Calculate the sum of fields in another table using MySQL SQL query I have a schema like this: User table with attributes "user_id" and "userna...
From 2024-04-06 19:39:29
0
1
441
sql groupby not working, I want to group by code_branch ->select('a.statusasstatus','b.nameascustomer_name','e.nameasbranch_name','c.nameas...
From 2024-04-06 19:24:49
0
2
488
Record query under partial value conditions - SQL skill sharing I have a table called zipcode which has a column called code. The Code column contains the...
From 2024-04-06 16:01:26
0
1
395
Node.js: Unable to store SQL query results in an array I'm trying to push the results of a SQL query to an array. However, it doesn't seem to wor...
From 2024-04-06 14:14:46
0
1
373
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