MySQL ATAN2 Function

MySQL ATAN2 function is one of the Numeric Functions, which is useful to return the arc tangent between specified two variables, i.e., x and y. Or you can say it returns the angle between the positive x-axis and the line from the origin to the point (y, x).

The basic syntax of the MySQL ATAN2 Function is as shown below:

FROM Source

-- Or you can use ATAN Function
FROM Source

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

Source Table 1

MySQL ATAN2 Function Example

The ATAN2 returns the trigonometric Arc tangent between two values, and the following query shows multiple ways to use this one.

-- on Negative Value
SELECT ATAN2(-2.54, -152.56) AS `ATAN2 Value`;

-- on Positive Value
SELECT ATAN2(150.52, 224.68) AS `ATAN2 Value`;

-- on string value
SELECT ATAN2('10.35', '4.25') AS `ATAN2 Value`;

-- on String
SELECT ATAN2('MySQL', '14') AS `ATAN2 Value`;

As you can see, we used the ATAN2 function to find the Arc Tangent values between two different values.

MySQL ATAN2 Function Example 2

This Numeric method also allows you to find the arctangent between two columns in a table. In this MySQL example, we are going to find the arctangent value between the standard cost column and the sales column. Here, we are also using the ATAN function to demonstrate that both these functions return the same output.

SELECT Product, Color,
		StandardCost, Sales, TaxAmt,
        ATAN2(StandardCost, Sales) AS `Sales ATAN2 Value`,
        ATAN(StandardCost, Sales) AS `Sales ATAN2 Value`
FROM `numeric functions`;
MySQL ATAN2 Function Example 3