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How to update two columns in a MySQL 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.
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