MySQL update multiple records in a single query?

Let us first create a table −

mysql> create table DemoTable
   -> (
   -> Id int NOT NULL AUTO_INCREMENT PRIMARY KEY,
   -> Marks1 int,
   -> Marks2 int,
   -> Marks3 int
   -> );
Query OK, 0 rows affected (0.60 sec)

Insert some records in the table using insert command −

mysql> insert into DemoTable(Marks1,Marks2,Marks3) values(45,67,34);
Query OK, 1 row affected (0.33 sec)
mysql> insert into DemoTable(Marks1,Marks2,Marks3) values(89,87,56);
Query OK, 1 row affected (0.13 sec)
mysql> insert into DemoTable(Marks1,Marks2,Marks3) values(87,56,54);
Query OK, 1 row affected (0.31 sec)

Display all records from the table using select statement −

mysql> select *from DemoTable;

This will produce the following output −

+----+--------+--------+--------+
| Id | Marks1 | Marks2 | Marks3 |
+----+--------+--------+--------+
|  1 |     45 |     67 |     34 |
|  2 |     89 |     87 |     56 |
|  3 |     87 |     56 |     54 |
+----+--------+--------+--------+
3 rows in set (0.00 sec)

Here is the query to update multiple records −

mysql> update DemoTable
   -> set Marks1=98,Marks2=96,Marks3=99
   -> where Id=1;
Query OK, 1 row affected (0.18 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 −

+----+--------+--------+--------+
| Id | Marks1 | Marks2 | Marks3 |
+----+--------+--------+--------+
|  1 |     98 |     96 |     99 |
|  2 |     89 |     87 |     56 |
|  3 |     87 |     56 |     54 |
+----+--------+--------+--------+
3 rows in set (0.00 sec)