The **SQL SQRT function** is a built-in mathematical function in SQL that returns the square root of a given numeric value. It is used to calculate the square root of a numeric value in a SQL statement.

## Syntax

The syntax for the **SQRT** function in SQL is as follows:

SQRT(value)

Here, the value parameter is the numeric value for which you want to calculate the square root. The value parameter can be a column name or a numeric value.

### Example

For example, suppose you have a table named employees with a column named salary, and you want to find the square root of the salary of each employee. You can use the **SQL SQRT function** as follows:

SELECT SQRT(salary) AS "Square Root of Salary" FROM employees;

In the above SQL statement, the **SQRT function** is used to find the square root of the salary column for each employee in the employees table. The result set will include a column named “Square Root of Salary” that contains the square root of the salary of each employee.

It is important to note that the **SQRT function** can only be used with numeric values, and it will return a NULL value if the input parameter is negative. Therefore, it is important to make sure that the input parameter is always a positive numeric value when using the SQRT function in SQL.