- 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
Check if MySQL entry exists and if it does, how to overwrite other columns?
For this, use INSERT ON DUPLICATE KEY UPDATE command. Let us first create a table −
mysql> create table DemoTable1891 ( FirstName varchar(20), UNIQUE KEY(FirstName) ); Query OK, 0 rows affected (0.00 sec)
Insert some records in the table using insert command −
mysql> insert into DemoTable1891 values('Chris') on duplicate key update FirstName='Robert';
Query OK, 1 row affected (0.00 sec)
mysql> insert into DemoTable1891 values('David') on duplicate key update FirstName='Robert';
Query OK, 1 row affected (0.00 sec)
mysql> insert into DemoTable1891 values('Chris') on duplicate key update FirstName='Robert';
Query OK, 2 rows affected (0.00 sec)Display all records from the table using select statement −
mysql> select * from DemoTable1891;
This will produce the following output −
+-----------+ | FirstName | +-----------+ | David | | Robert | +-----------+ 2 rows in set (0.00 sec)
Updated on: 27-Dec-2019
206 Views
Advertisements