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
MySQL query to decrease value by 10 for a specific value?
Let us first create a table −
mysql> create table DemoTable ( Id int NOT NULL AUTO_INCREMENT PRIMARY KEY, Score int ); Query OK, 0 rows affected (0.89 sec)
Insert some records in the table using insert command −
mysql> insert into DemoTable(Score) values(67); Query OK, 1 row affected (0.20 sec) mysql> insert into DemoTable(Score) values(78); Query OK, 1 row affected (0.18 sec) mysql> insert into DemoTable(Score) values(90); Query OK, 1 row affected (0.12 sec) mysql> insert into DemoTable(Score) values(56); Query OK, 1 row affected (0.13 sec)
Display all records from the table using select statement −
mysql> select *from DemoTable;
Output
+----+-------+ | Id | Score | +----+-------+ | 1 | 67 | | 2 | 78 | | 3 | 90 | | 4 | 56 | +----+-------+ 4 rows in set (0.00 sec)
Following is the query to decrease value by 10 for a specific value −
mysql> update DemoTable set Score=Score-10 where Id=3; Query OK, 1 row affected (0.38 sec) Rows matched : 1 Changed : 1 Warnings : 0
Let us check the table records once again −
mysql> select *from DemoTable;
Output
+----+-------+ | Id | Score | +----+-------+ | 1 | 67 | | 2 | 78 | | 3 | 80 | | 4 | 56 | +----+-------+ 4 rows in set (0.00 sec)
Updated on: 30-Jul-2019
460 Views
Advertisements