- Trending Categories
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
Set conditions while adding column values in MySQL?
To set conditions while adding column values, use MySQL IF(). Let us first create a table −
mysql> create table DemoTable -> ( -> Value1 int, -> Value2 int, -> Value3 int -> ); Query OK, 0 rows affected (0.64 sec)
Insert some records in the table using insert command −
mysql> insert into DemoTable values(10,20,-30); Query OK, 1 row affected (0.20 sec) mysql> insert into DemoTable values(50,60,90); Query OK, 1 row affected (0.18 sec) mysql> insert into DemoTable values(100,200,400); Query OK, 1 row affected (0.09 sec) mysql> insert into DemoTable values(30,40,-50); Query OK, 1 row affected (0.16 sec) mysql> insert into DemoTable values(70,80,-1); Query OK, 1 row affected (0.24 sec)
Display all records from the table using select statement −
mysql> select * from DemoTable;
This will produce the following output −
+--------+--------+--------+ | Value1 | Value2 | Value3 | +--------+--------+--------+ | 10 | 20 | -30 | | 50 | 60 | 90 | | 100 | 200 | 400 | | 30 | 40 | -50 | | 70 | 80 | -1 | +--------+--------+--------+ 5 rows in set (0.00 sec)
Here is the query to set conditions while adding column values −
mysql> select Value1+Value2+if(Value3 > 0,Value3,0) from DemoTable;
This will produce the following output −
+---------------------------------------+ | Value1+Value2+if(Value3 > 0,Value3,0) | +---------------------------------------+ | 30 | | 200 | | 700 | | 70 | | 150 | +---------------------------------------+ 5 rows in set (0.00 sec)
Updated on: 26-Feb-2020
237 Views
Advertisements