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Can we order a MySQL result with mathematical operations?
Yes, we can order with mathematical operations using ORDER BY clause. Let us first create a table:
mysql> create table orderByMathCalculation -> ( -> Id int NOT NULL AUTO_INCREMENT PRIMARY KEY, -> Quantity int, -> Price int -> ); Query OK, 0 rows affected (0.57 sec)
Following is the query to insert some records in the table using insert command:
mysql> insert into orderByMathCalculation(Quantity,Price) values(10,50); Query OK, 1 row affected (0.21 sec) mysql> insert into orderByMathCalculation(Quantity,Price) values(20,40); Query OK, 1 row affected (0.14 sec) mysql> insert into orderByMathCalculation(Quantity,Price) values(2,20); Query OK, 1 row affected (0.13 sec) mysql> insert into orderByMathCalculation(Quantity,Price) values(11,10); Query OK, 1 row affected (0.24 sec)
Following is the query to display all records from the table using select statement:
mysql> select *from orderByMathCalculation;
This will produce the following output
+----+----------+-------+ | Id | Quantity | Price | +----+----------+-------+ | 1 | 10 | 50 | | 2 | 20 | 40 | | 3 | 2 | 20 | | 4 | 11 | 10 | +----+----------+-------+ 4 rows in set (0.00 sec)
Case 1: Here is the query to do order by mathematical operations in ascending order.
mysql> select *from orderByMathCalculation order by Quantity*Price;
This will produce the following output
+----+----------+-------+ | Id | Quantity | Price | +----+----------+-------+ | 3 | 2 | 20 | | 4 | 11 | 10 | | 1 | 10 | 50 | | 2 | 20 | 40 | +----+----------+-------+ 4 rows in set (0.00 sec)
Case 1: Here is the query to do order by mathematical operations in descending order.
mysql> select *from orderByMathCalculation order by Quantity*Price desc;
This will produce the following output
+----+----------+-------+ | Id | Quantity | Price | +----+----------+-------+ | 2 | 20 | 40 | | 1 | 10 | 50 | | 4 | 11 | 10 | | 3 | 2 | 20 | +----+----------+-------+ 4 rows in set (0.00 sec)
Updated on: 30-Jul-2019
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