- 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
How to replace rows in a MySQL table with conditions?
To set conditions and replace rows, use MySQL CASE statement. Let us first create a table −
mysql> create table DemoTable1481 -> ( -> PlayerScore int -> ); Query OK, 0 rows affected (0.42 sec)
Insert some records in the table using insert command −
mysql> insert into DemoTable1481 values(454); Query OK, 1 row affected (0.41 sec) mysql> insert into DemoTable1481 values(765); Query OK, 1 row affected (0.14 sec) mysql> insert into DemoTable1481 values(890); Query OK, 1 row affected (0.09 sec)
Display all records from the table using select statement −
mysql> select * from DemoTable1481;
This will produce the following output −
+-------------+ | PlayerScore | +-------------+ | 454 | | 765 | | 890 | +-------------+ 3 rows in set (0.00 sec)
Following is the query to replace rows in a MySQL table −
mysql> update DemoTable1481 -> set PlayerScore= case when PlayerScore=454 then 1256 -> when PlayerScore=765 then 1865 -> when PlayerScore=890 then 3990 -> end -> ; Query OK, 3 rows affected (0.17 sec) Rows matched: 3 Changed: 3 Warnings: 0
Let us check the table records once again −
mysql> select * from DemoTable1481;
This will produce the following output −
+-------------+ | PlayerScore | +-------------+ | 1256 | | 1865 | | 3990 | +-------------+ 3 rows in set (0.00 sec)
Advertisements