Calculating power of a number in MySQL?

To calculate power of a number, use POWER() function. Let us first create a table −

mysql> create table DemoTable
   (
      Amount int
   );
Query OK, 0 rows affected (0.89 sec)

Insert some records in the table using insert command −

mysql> insert into DemoTable values(64);
Query OK, 1 row affected (0.17 sec)
mysql> insert into DemoTable values(144);
Query OK, 1 row affected (0.12 sec)
mysql> insert into DemoTable values(400);
Query OK, 1 row affected (0.13 sec)

Display all records from the table using select statement −

mysql> select *from DemoTable;

This will produce the following output −

+--------+
| Amount |
+--------+
| 64     |
| 144    |
| 400    |
+--------+
3 rows in set (0.00 sec)

Following is the query to calculate power of a number −

mysql− select Amount,power(Amount,2) AS CURRENT_AMOUNT from DemoTable;

This will produce the following output −

+--------+----------------+
| Amount | CURRENT_AMOUNT |
+--------+----------------+
| 64     | 4096           |
| 144    | 20736          |
| 400    | 160000         |
+--------+----------------+
3 rows in set (0.04 sec)