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
How to create conditions in a MySQL table with multiple columns?
For conditions, use IF(). Following is the syntax −
IF(yourCondition, trueStatement,falseStatement);
Let us first create a table −
mysql> create table DemoTable612 (Number1 int,Number2 int,Score int); Query OK, 0 rows affected (0.47 sec)
Insert some records in the table using insert command −
mysql> insert into DemoTable612 values(10,20,1000); Query OK, 1 row affected (0.12 sec) mysql> insert into DemoTable612 values(30,40,500); Query OK, 1 row affected (0.19 sec) mysql> insert into DemoTable612 values(50,70,1200); Query OK, 1 row affected (0.15 sec) mysql> insert into DemoTable612 values(100,120,400); Query OK, 1 row affected (0.16 sec)
Display all records from the table using select statement −
mysql> select *from DemoTable612;
This will produce the following output −
+---------+---------+-------+ | Number1 | Number2 | Score | +---------+---------+-------+ | 10 | 20 | 1000 | | 30 | 40 | 500 | | 50 | 70 | 1200 | | 100 | 120 | 400 | +---------+---------+-------+ 4 rows in set (0.00 sec)
Here is the query to create conditions in MySQL −
mysql> select *,If(Score > 500, Number1*Number2,Number1+Number2) AS Result from DemoTable612;
This will produce the following output −
+---------+---------+-------+--------+ | Number1 | Number2 | Score | Result | +---------+---------+-------+--------+ | 10 | 20 | 1000 | 200 | | 30 | 40 | 500 | 70 | | 50 | 70 | 1200 | 3500 | | 100 | 120 | 400 | 220 | +---------+---------+-------+--------+ 4 rows in set (0.00 sec)
Updated on: 22-Aug-2019
256 Views
Advertisements