Mysql Minus Query

Mysql Minus Query is used to return the calculated value from subtracting the maximum value and minimum value.

Understand with Example

The Tutorial illustrate an example from 'Mysql Minus Query'. To understand and elaborate example we create a table 'employee' with required fieldnames and datatypes respectively.

Query for creating table name Employee:

mysql> CREATE TABLE Employee(
    ->              Empid int(10),
    ->              Empname varchar(60),
    ->              Salary int(90),
    ->              DOB date
    ->            );
Query OK, 0 rows affected (0.01 sec)

Query for  insertion of data in table:

The Query insert into is used to add the records and rows to the table 'Employee'.

mysql>     INSERT INTO Employee (Empid,Empname,Salary,DOB) VALUES
    ->     (01,'Habib',2014,20041202),
    ->     (02,'Karan',4021,20030411),
    ->     (03,'Samia', 22,20080223),
    ->     (04,'Hui Ling', 25,20081015),
    ->     (05,'Yumie', 29,19990126);
Query OK, 5 rows affected (0.00 sec)
Records: 5  Duplicates: 0  Warnings: 0

Query to view data inserted in table:

To view the records detail from table employee we use select query.

mysql> select * from employee;

Output:-

+-------+----------+--------+------------+
| Empid | Empname  | Salary | DOB        |
+-------+----------+--------+------------+
|     1 | Habib    |   2014 | 2004-12-02 |
|     2 | Karan    |   4021 | 2003-04-11 |
|     3 | Samia    |     22 | 2008-02-23 |
|     4 | Hui Ling |     25 | 2008-10-15 |
|     5 | Yumie    |     29 | 1999-01-26 |
+-------+----------+--------+------------+
5 rows in set (0.00 sec)

Query to use Mysql minus query to the data of the table:

The Query Mysql minus query is used to find the difference between the maximum salary and minimum salary as deducated salary fieldname from table employee.

mysql> select max(salary)-min(salary)as DeductedSalary from employee;
+----------------+
| DeductedSalary |
+----------------+
|           3999 |
+----------------+
1 row in set (0.00 sec)

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