Data Structure
Networking
RDBMS
Operating System
Java
MS Excel
iOS
HTML
CSS
Android
Python
C Programming
C++
C#
MongoDB
MySQL
Javascript
PHP
Physics
Chemistry
Biology
Mathematics
English
Economics
Psychology
Social Studies
Fashion Studies
Legal Studies
- Selected Reading
- UPSC IAS Exams Notes
- Developer's Best Practices
- Questions and Answers
- Effective Resume Writing
- HR Interview Questions
- Computer Glossary
- Who is Who
Add records from corresponding duplicate values in another column with MySQL
For this, you can use the aggregate function SUM() along with the GROUP BY clause. Let us first create a table −
mysql> create table DemoTable -> ( -> Name varchar(20), -> Value int -> ); Query OK, 0 rows affected (2.08 sec)
Insert some records in the table using insert command −
mysql> insert into DemoTable values('Chris',50);
Query OK, 1 row affected (0.15 sec)
mysql> insert into DemoTable values('David',90);
Query OK, 1 row affected (0.19 sec)
mysql> insert into DemoTable values('Chris',60);
Query OK, 1 row affected (0.11 sec)
mysql> insert into DemoTable values('Bob',100);
Query OK, 1 row affected (0.15 sec)
mysql> insert into DemoTable values('David',80);
Query OK, 1 row affected (0.21 sec)Display all records from the table using select statement −
mysql> select * from DemoTable;
This will produce the following output −
+-------+-------+ | Name | Value | +-------+-------+ | Chris | 50 | | David | 90 | | Chris | 60 | | Bob | 100 | | David | 80 | +-------+-------+ 5 rows in set (0.00 sec)
Following is the query to add records from duplicate values in another column −
mysql> select Name,sum(Value) as GrandTotal from DemoTable group by Name;
This will produce the following output −
+-------+------------+ | Name | GrandTotal | +-------+------------+ | Chris | 110 | | David | 170 | | Bob | 100 | +-------+------------+ 3 rows in set (0.03 sec)
Updated on: 28-Feb-2020
182 Views
Advertisements