MySQL FLOOR Function

MySQL FLOOR function is one of the Numeric Function which will return the closest integer value that is less than or equal to the specified expression. In this article we will show you, How to find the floor (closest) value in MySQL using Command Prompt, and Workbench with example.

MySQL FLOOR Syntax

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

SELECT FLOOR (Numeric_Expression)
FROM Source

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

MySQL FLOOR Function Example 1

The FLOOR Function is used to return the closest integer value less than the specified number. The following MySQL query will show multiple ways to use FLOOR function.

-- MySQL FLOOR Function Example

-- Floor Function on Negative Value
SELECT FLOOR(-120.91) AS `Floor Value`;

-- Floor Function on Positive Value
SELECT FLOOR(205.97) AS `Floor Value`;

-- Floor Function on string value
SELECT FLOOR('801.95') AS `Floor Value`;

-- Floor Function on String
SELECT FLOOR('MySQL') AS `Floor Value`;

-- Floor Function on NULLs
SELECT FLOOR('NULL') AS `Floor Value`;

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

MySQL FLOOR Example 2

In MySQL, Numeric Function FLOOR also allows you to find closest value for the column data. In this example, we are going to find the find the floor values for all the records present in Service Grade column.

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

OUTPUT

MySQL FLOOR – WHERE Clause Example

We can also use this FLOOR function in Where Clause as well. In this example we will use Floor function in where clause to restrict the records selected by the SELECT Statement.

-- MySQL FLOOR Function Example
USE mysqltutorial;
SELECT Product, Color,
		StandardCost, FLOOR(StandardCost) AS Cost, 
        Sales, FLOOR(Sales) AS Sales, 
        TaxAmt, FLOOR(TaxAmt) AS Tax,
        ServiceGrade, FLOOR(ServiceGrade) AS Grade
FROM `numeric functions`
WHERE FLOOR(TaxAmt) > 200;

OUTPUT

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