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Change multiple columns in a single MySQL query?
For this, use UPDATE and REPLACE() in MySQL. Let us first create a table −
mysql> create table DemoTable -> ( -> StudentId int NOT NULL AUTO_INCREMENT PRIMARY KEY, -> StudentName varchar(100), -> StudentCountryName varchar(100) -> ); Query OK, 0 rows affected (0.67 sec)
Insert some records in the table using insert command −
mysql> insert into DemoTable(StudentName,StudentCountryName) values('John','US');
Query OK, 1 row affected (0.15 sec)Display all records from the table using select statement −
mysql select *from DemoTable;
Output
This will produce the following output −
+-----------+-------------+--------------------+ | StudentId | StudentName | StudentCountryName | +-----------+-------------+--------------------+ | 1 | John | US | +-----------+-------------+--------------------+ 1 row in set (0.00 sec)
Following is the query to update multiple columns −
mysql> update DemoTable -> set StudentName=replace(StudentName,'John','Chris'), -> StudentCountryName=replace(StudentCountryName,'US','UK'); Query OK, 1 row affected (0.69 sec) Rows matched: 1 Changed: 1 Warnings: 0
Let us check the table records once again −
mysql> select *from DemoTable;
Output
This will produce the following output −
+-----------+-------------+--------------------+ | StudentId | StudentName | StudentCountryName | +-----------+-------------+--------------------+ | 1 | Chris | UK | +-----------+-------------+--------------------+ 1 row in set (0.00 sec)
Updated on: 30-Jun-2020
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