MySQL SQRT Function

MySQL SQRT function is one of the Mathematical Function which will return the square root of any positive expression. In this article we will show you, How to find the square root in MySQL using Command Prompt, and Workbench with example.

MySQL SQRT Syntax

The basic syntax of the SQRT in MySQL is as shown below:

SELECT SQRT (Numeric_Expression)
FROM Source

To demonstrate this SQRT Numeric function, we are going to use the below shown data

MySQL SQRT Function Example 1

The SQRT Function is used to return the square root of the positive expression, or number. The following MySQL query will show multiple ways to use SQRT function.

-- MySQL SQRT Function Example

-- Square Root of Negative Value
SELECT SQRT(-120.00) AS `Square Root Value`;

-- Square Root of Positive Value
SELECT SQRT(16) AS `Square Root Value`;

-- Square Root of string value
SELECT SQRT('24') AS `Square Root Value`;

-- Square Root of a String
SELECT SQRT('MySQL') AS `Square Root Value`;

-- Square Root of NULLs
SELECT SQRT('NULL') AS `Square Root Value`;

From the below screenshot you can see, we used SQRT function on different values. Here, we assigned a new name to the result as ‘Square Root Value’ using ALIAS Column.

MySQL SQRT Example 2

In MySQL, SQRT also allows you to find square root for the column data. In this example, we are going to find the square root of all the records present in in Standard Cost, Sales, tax Amount, and Service Grade columns.

-- MySQL SQRT Function Example
USE mysqltutorial;
SELECT Product, Color,
		StandardCost, SQRT(StandardCost) AS Cost, 
        Sales, SQRT(Sales) AS Sales, 
        TaxAmt, SQRT(TaxAmt) AS Tax
FROM `numeric functions`;

OUTPUT

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