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MySQL HOUR() function

HOUR() function

MySQL HOUR() returns the HOUR of a time. The return value is within the range of 0 to 23 for time-of-day values. The range of time values may be larger than 23.

Syntax:

HOUR(time)

Where time is a time.

Syntax Diagram:

MySQL HOUR() Function - Syntax Diagram

MySQL Version: 5.6


Video Presentation

Pictorial Presentation

Pictorial Presentation of MySQL HOUR() function

Example: MySQL HOUR() function

If we get to return the HOUR from the given time 15:13:46, the following SQL can be used -

Code:

SELECT HOUR('15:13:46');

Sample Output:

mysql> SELECT HOUR('15:13:46');
+------------------+
| HOUR('15:13:46') |
+------------------+
|               15 | 
+------------------+
1 row in set (0.01 sec)

PHP script

<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>example-HOUR-function - php mysql examples | w3resource</title>
<meta name="description" content="example-HOUR-function - php mysql examples | w3resource">
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.5/css/bootstrap.min.css">
</head>
<body>
<div class="container">
<div class="row">
<div class="col-md-12">
<h2>Extract HOUR from 15:13:46:</h2>
<table class='table table-bordered'>
<tr>
<th>HOUR from 15:13:46</th>
</tr>
<?php
$hostname="your_hostname";
$username="your_username";
$password="your_password";
$db = "your_dbname";
$dbh = new PDO("mysql:host=$hostname;dbname=$db", $username, $password);
foreach($dbh->query('SELECT HOUR("15:13:46")') as $row) {
echo "<tr>";
echo "<td>" . $row['HOUR("15:13:46")'] . "</td>";
echo "</tr>"; 
}
?>
</tbody></table>
</div>
</div>
</div>
</body>
</html>

View the example in browser

JSP script

<%@page contentType="text/html" pageEncoding="UTF-8"%>
<%@ page import="java.sql.*" %>
<%@ page import="java.io.*" %>
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>example-hour-function</title>
</head>
<body>
<%
try {
Class.forName("com.mysql.jdbc.Driver").newInstance();
String Host = "jdbc:mysql://localhost:3306/w3resour_bookinfo";
Connection connection = null;
Statement statement = null;
ResultSet rs = null;
connection = DriverManager.getConnection(Host, "root", "datasoft123");
statement = connection.createStatement();
String Data = "SELECT HOUR('15:13:46')";
rs = statement.executeQuery(Data);
%>
<TABLE border="1">
<tr width="10" bgcolor="#9979">
<td>HOUR from 15:13:46</td>
</tr>
<%
while (rs.next()) {
%>
<TR>
<TD><%=rs.getString("HOUR('15:13:46')")%></TD>
</TR>
<%   }    %>
</table>
<%
rs.close();
statement.close();
connection.close();
} catch (Exception ex) {

out.println("Can’t connect to database.");
}
%>
</body>
</html>

Sample table: wages_emp

+--------+----------+------------+-----------+----------+---------+-------+
| emp_id | emp_name | wor_dt     | time_from | time_to  | hr_rate | wages |
+--------+----------+------------+-----------+----------+---------+-------+
| E001   | RAMON    | 2010-02-10 | 10:00:00  | 14:00:00 |      50 |   200 | 
| E002   | SILTON   | 2010-05-05 | 11:00:00  | 16:00:00 |      60 |   300 | 
| E001   | RAMON    | 2010-07-11 | 11:00:00  | 16:00:00 |      60 |   300 | 
| E001   | RAMON    | 2011-09-15 | 08:00:00  | 12:00:00 |      75 |   300 | 
+--------+----------+------------+-----------+----------+---------+-------+

MySQL HOUR() function with WHERE clause

If we want to know the information for the worker who starts the work after 10 a.m, the following sql can be used -

Code:

SELECT * FROM wages_emp
WHERE HOUR(time_from)>10;

Sample Output:

+--------+----------+------------+-----------+----------+---------+-------+
| emp_id | emp_name | wor_dt     | time_from | time_to  | hr_rate | wages |
+--------+----------+------------+-----------+----------+---------+-------+
| E002   | SILTON   | 2010-05-05 | 11:00:00  | 16:00:00 |      60 |   300 | 
| E001   | RAMON    | 2010-07-11 | 11:00:00  | 16:00:00 |      60 |   300 | 
+--------+----------+------------+-----------+----------+---------+-------+
2 rows in set (0.00 sec)

MySQL HOUR() function with BETWEEN

If we want to know the information for the workers who works for a duration of 2 to 4 hours, the following sql can be used -

Code:

SELECT emp_name,wor_dt,time_from,time_to,
HOUR(time_to)-HOUR(time_from) as duration,wages
FROM wages_emp
WHERE HOUR(time_to)-HOUR(time_from)
BETWEEN 2 AND 4;

Sample Output:

+----------+------------+-----------+----------+----------+-------+
| emp_name | wor_dt     | time_from | time_to  | duration | wages |
+----------+------------+-----------+----------+----------+-------+
| RAMON    | 2010-02-10 | 10:00:00  | 14:00:00 |        4 |   200 | 
| RAMON    | 2011-09-15 | 08:00:00  | 12:00:00 |        4 |   300 | 
+----------+------------+-----------+----------+----------+-------+
2 rows in set (0.00 sec)

MySQL HOUR() function with IN

If we want to know the information for the workers who usually starts work at 8 or 9 or 11 a.m. to their working days, the following sql can be used -

Code:

SELECT * 
FROM wages_emp
WHERE HOUR(time_from)
IN(8,9,11);

Sample Output:

+--------+----------+------------+-----------+----------+---------+-------+
| emp_id | emp_name | wor_dt     | time_from | time_to  | hr_rate | wages |
+--------+----------+------------+-----------+----------+---------+-------+
| E002   | SILTON   | 2010-05-05 | 11:00:00  | 16:00:00 |      60 |   300 | 
| E001   | RAMON    | 2010-07-11 | 11:00:00  | 16:00:00 |      60 |   300 | 
| E001   | RAMON    | 2011-09-15 | 08:00:00  | 12:00:00 |      75 |   300 | 
+--------+----------+------------+-----------+----------+---------+-------+
3 rows in set (0.00 sec)

All Date and Time Functions:

Click here to see the MySQL Date and time functions.

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