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)