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MySQL LAST_DAY Function

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MySQL LAST_DAY function is a Date Function, which is used to return the Last day of the month from the given date.

In this article, we will show you, How to use this LAST_DAY function to get the Last day in a month in MySQL from an expression with example.

MySQL LAST_DAY Syntax

The basic syntax of the LAST_DAY() Function in MySQL is as shown below:

LAST_DAY(date or expression);

MySQL LAST_DAY function Example

These examples helps you understand the use of last day function. Here, we are returning the last day of the month from different date expressions.

SELECT LAST_DAY('2017-01-01');

SELECT LAST_DAY('2018-06-14');

SELECT LAST_DAY('2018-09-14');

OUTPUT

MySQL LAST_DAY Function 1

Let us see another example of MySQL LAST DAY function. Here, we are returning the last day of month from the current date and time returned by the Now(), and CURDATE() function.

SELECT LAST_DAY(NOW()), LAST_DAY(CURRENT_DATE());

OUTPUT

MySQL LAST_DAY Function 2

MySQL LAST_DAY Function Example 2

The following queries show you, what happens when we try to return the day of year value from string date, or invalid dates.

SELECT LAST_DAY(NOW() + 22);

SELECT LAST_DAY('2018-06-32');

SELECT LAST_DAY(CURDATE() + 22);

OUTPUT

MySQL LAST_DAY Function 3

From the above screenshot, LAST_DAY(‘2018-06-32’); statement returned NULL. Because, it’s an invalid date.

Within the Last statement, LAST_DAY(CURDATE() + 22); means, LAST_DAY(‘2019-02-33’);. Again, it’s an invalid date.

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