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;
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;
This will produce the following output −
+-----------+-------------+--------------------+
| StudentId | StudentName | StudentCountryName |
+-----------+-------------+--------------------+
| 1 | Chris | UK |
+-----------+-------------+--------------------+
1 row in set (0.00 sec)
Published on 11-Jul-2019 14:06:28
