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MySQL HOUR Function

MySQL Hour function is one of the Date Functions, which returns the Hour from the given time. This MySQL Hour function returns ta value from 0 to 23. However, if the time is huge, the function return value greater than 23. The syntax of the Hour Function is as shown below:

HOUR(Time or DateTime expression);

MySQL Hour function Example

These examples help you understand the use of hour function. Here, we are returning the hours from different times and a DateTime expression.

SELECT HOUR('11:12:03');

SELECT HOUR('23:12:33');

SELECT HOUR('2019-01-12 03:12:33');
MySQL HOUR Function 1

Let us see another example of the Hour Date Function. Here, we are using NOW, UTC_TIME, and UTC_TIMESTAMP inside this Hour function to return the Hour from the current date and time.

SELECT HOUR(NOW());

SELECT HOUR(UTC_TIME());

SELECT HOUR(UTC_TIMESTAMP());
MySQL HOUR Function 2

Hour Function Example 2

The following MySQL queries show you what happens when we try to return the hours from string DateTime, invalid time, or 0 as the time value.

SELECT HOUR(NOW() + 15);

SELECT HOUR('10:12:87');

SELECT HOUR('00:00:00');
MySQL HOUR Function 3