How to update two columns in a MySQL database?

MySQLMySQLi Database

You can update two columns using SET command separated with comma(,). The syntax is as follows −

UPDATE yourTableName SET yourColumnName1 = ’yourValue1’, yourColumnName2 = ’yourValue2’ where yourCondition;

To understand the above syntax, let us create a table. The query to create a table is as follows −

mysql> create table StudentInformations
   -> (
   -> StudentId int not null auto_increment,
   -> StudentFirstName varchar(20),
   -> StudentLastName varchar(20),
   -> Primary Key(StudentId)
   -> );
Query OK, 0 rows affected (0.57 sec)

Insert some records in the table using insert command. The query is as follows −

mysql> insert into StudentInformations(StudentFirstName,StudentLastName)
values('John','Smith');
Query OK, 1 row affected (0.16 sec)

mysql> insert into StudentInformations(StudentFirstName,StudentLastName)
values('Carol','Taylor');
Query OK, 1 row affected (0.17 sec)

mysql> insert into StudentInformations(StudentFirstName,StudentLastName)
values('Mike','Jones');
Query OK, 1 row affected (0.13 sec)

mysql> insert into StudentInformations(StudentFirstName,StudentLastName)
values('Sam','Williams');
Query OK, 1 row affected (0.16 sec)

mysql> insert into StudentInformations(StudentFirstName,StudentLastName)
values('Bob','Davis');
Query OK, 1 row affected (0.14 sec)

mysql> insert into StudentInformations(StudentFirstName,StudentLastName)
values('David','Miller');
Query OK, 1 row affected (0.20 sec)

Display all records from the table using select statement. The query is as follows −

mysql> select *from StudentInformations;

The following is the output.

+-----------+------------------+-----------------+
| StudentId | StudentFirstName | StudentLastName |
+-----------+------------------+-----------------+
|         1 | John             | Smith           |
|         2 | Carol            | Taylor          |
|         3 | Mike             | Jones           |
|         4 | Sam              | Williams        |
|         5 | Bob              | Davis           |
|         6 | David            | Miller          |
+-----------+------------------+-----------------+
6 rows in set (0.00 sec)

Here is the query to update two columns in MySQL database. We are updating the records of student with id 3 −

mysql> update StudentInformations set StudentFirstName = 'Robert',
StudentLastName = 'Brown' where
   -> StudentId = 3;
Query OK, 1 row affected (0.12 sec)
Rows matched − 1 Changed − 1 Warnings − 0

Check the updated value in the table using select statement. The query is as follows −

mysql> select *from StudentInformations;

The following is the output −

+-----------+------------------+-----------------+
| StudentId | StudentFirstName | StudentLastName |
+-----------+------------------+-----------------+
|         1 | John             | Smith           |
|         2 | Carol            | Taylor          |
|         3 | Robert           | Brown           |
|         4 | Sam              | Williams        |
|         5 | Bob              | Davis           |
|         6 | David            | Miller          |
+-----------+------------------+-----------------+
6 rows in set (0.00 sec)

Now, you can see above, the StudentId 3 records i.e. StudentFirstName and StudentLastName values have been changed successfully.

raja
Published on 31-Jan-2019 11:58:39
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