SQL arithmetic subtraction

SQL is a powerful programming language that allows you to manipulate and retrieve data from relational databases. One of the most common operations performed in SQL is arithmetic subtraction. This operation allows you to subtract one numeric value from another, and it is often used in calculations and data analysis.

To perform subtraction in SQL, you can use the «-» operator. This operator subtracts the second operand from the first operand and returns the result. For example, if you have two numeric values, such as 10 and 5, you can subtract 5 from 10 using the following SQL query:

SELECT 10 — 5;

This query will return the result of the subtraction, which in this case is 5. You can also perform subtraction with columns in a table. If you have a table with two columns, such as «quantity» and «price», you can subtract the price from the quantity to calculate the total cost of the items:

SELECT quantity — price AS total_cost FROM products;

In this query, the «AS» keyword is used to give a name to the result of the subtraction, which is «total_cost». The result will be a new column in the result set that contains the calculated total cost.

Arithmetic subtraction in SQL is a useful operation for performing calculations and analyzing data. It allows you to manipulate numeric values and obtain meaningful results. By understanding how to use the subtraction operator and applying it to your data, you can gain insights and make informed decisions.

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