MySQL - Multiplication Operator (*)

MySQL supports various types of operators, like arithmetic operators, comparison operators, logical operators, assignment operators, etc. Various operators are used for different purposes. And arithmetic operators work with numeric values present in the data stored.

The Multiplication operator (*) is used to multiply two values in a dataset and returns their product as a result-set.

This operator can also be used with SQL statements like SELECT, UPDATE, and DELETE in MySQL, along with clauses like WHERE, ORDER BY etc.

Syntax

Following is the syntax of MySQL Multiplication operator −

[SELECT|DELETE|UPDATE] x * y;

Where, "x" and "y" are placeholders for the numeric values you want to multiply.

Example

In the following query, we are using the multiplication operator (*) to multiply two numbers −

SELECT 4156456 * 56445 As Result;

Output

This will produce the following result −

Result
234611158920

Example

In this query, we are multiplying two float numbers a whole number using the multiplication operator −

SELECT 547.5478 * 657.3547 * 5475 As Result;

Output

This will produce the following result −

Result
1970633830.93051350

Example

We can also have negative values as operands in this operation −

SELECT 4445 * -533 As Result;

Output

This will produce the following result −

4445 * -533
-2369185

Example

In the following query, we are creating a table named CUSTOMERS using the CREATE TABLE statement −

CREATE TABLE CUSTOMERS (
   ID INT AUTO_INCREMENT,
   NAME VARCHAR(20) NOT NULL,
   AGE INT NOT NULL,
   ADDRESS CHAR (25),
   SALARY DECIMAL (18, 2),
   PRIMARY KEY (ID)
);

The below query adds 7 records into the above created table −

INSERT INTO CUSTOMERS (ID,NAME,AGE,ADDRESS,SALARY) VALUES 
(1, 'Ramesh', 32, 'Ahmedabad', 2000.00 ),
(2, 'Khilan', 25, 'Delhi', 1500.00 ),
(3, 'Kaushik', 23, 'Kota', 2000.00 ),
(4, 'Chaitali', 25, 'Mumbai', 6500.00 ),
(5, 'Hardik', 27, 'Bhopal', 8500.00 ),
(6, 'Komal', 22, 'Hyderabad', 4500.00 ),
(7, 'Muffy', 24, 'Indore', 10000.00 );

To verify whether the records are inserted, execute the following query −

Select * From CUSTOMERS;

Following is the CUSTOMERS table −

ID NAME AGE ADDRESS SALARY
1 Ramesh 32 Ahmedabad 2000.00
2 Khilan 25 Delhi 1500.00
3 Kaushik 23 Kota 2000.00
4 Chaitali 25 Mumbai 6500.00
5 Hardik 27 Bhopal 8500.00
6 Komal 22 Hyderabad 4500.00
7 Muffy 24 Indore 10000.00

Here, we are using the MySQL multiplication operator to multiply the age and salary of every customer −

SELECT NAME, AGE * SALARY as RESULT 
FROM CUSTOMERS;

This will produce the following result −

NAME RESULT
Ramesh 64000.00
Khilan 37500.00
Kaushik 46000.00
Chaitali 162500.00
Hardik 229500.00
Komal 99000.00
Muffy 240000.00

Example

You can also use the multiplication operator with DELETE statement along with WHERE clause and assignment operators.

In this example, we are deleting all records in the "CUSTOMERS" table where the "SALARY" column is equal to 2000. 

DELETE FROM CUSTOMERS
WHERE SALARY = 2000.00 * 1;

Output

Two records are deleted from the CUSTOMERS table −

Query OK, 2 rows affected (0.01 sec)

Verification

To verify whether the records in salary column that are equal to 2000 are deleted, execute the below query −

Select * From CUSTOMERS;

Following is the updated CUSTOMERS table −

ID NAME AGE ADDRESS SALARY
2 Khilan 25 Delhi 1500.00
4 Chaitali 25 Mumbai 6500.00
5 Hardik 27 Bhopal 8500.00
6 Komal 22 Hyderabad 4500.00
7 Muffy 24 Indore 10000.00

Example

Along with SELECT and DELETE statements, you can also use the division operator with the UPDATE statement.

In the following example, we are updating the SALARY column in the CUSTOMERS table. We are multiplying the current salary of each customer by 2 −

UPDATE CUSTOMERS
SET SALARY = SALARY * 2;

Output

This will produce the following result −

Query OK, 5 rows affected (0.01 sec)
Rows matched: 5  Changed: 5  Warnings: 0

Verification

Execute the below query to verify whether the salaries has been updated or not −

Select * From CUSTOMERS;

Following is the updated CUSTOMERS table −

ID NAME AGE ADDRESS SALARY
2 Khilan 25 Delhi 3000.00
4 Chaitali 25 Mumbai 13000.00
5 Hardik 27 Bhopal 17000.00
6 Komal 22 Hyderabad 9000.00
7 Muffy 24 Indore 20000.00
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