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MYSQL Tutorial

MySQL select with date_add()

Select with date_add()

In this page, we have discussed how to use MySQL date_add() function. This is useful to add a time interval to a given date.

Example:

Sample table: publisher


Code:

SELECT pub_name,estd 
FROM publisher 
WHERE MONTH(estd) =        
MONTH(DATE_ADD(CURDATE(),INTERVAL -7 MONTH));

Explanation

The above MySQL statement returns pub_name and estd of those publishers, whose month of an establishment is equal to the month part of a date which is seven months before the current date.

Sample Output:

mysql> SELECT pub_name,estd 
    -> FROM publisher 
    -> WHERE MONTH(estd) =        
    -> MONTH(DATE_ADD(CURDATE(),INTERVAL -7 MONTH));
+-------------------------+------------+
| pub_name                | estd       |
+-------------------------+------------+
| New Harrold Publication | 1975-09-05 | 
+-------------------------+------------+
1 row in set (0.00 sec)

Note: Since CURDATE() is used, your output may vary form the output shown.

PHP script

<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>example-select-with-date-add php mysql examples | w3resource</title>
<meta name="description" content="example-select-with-date-add 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>List of publishers with their city and date of establishment, where their respective month of establishment equals
two months before the current month:</h2>
<table class='table table-bordered'>
<tr>
<th>Publisher's name</th><th>Date of establishment</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 pub_name,estd FROM publisher WHERE MONTH(estd) = MONTH(DATE_ADD(CURDATE(),INTERVAL -7 MONTH))') as $row) {
echo "<tr>"; 
echo "<td>" . $row['pub_name'] . "</td>"; 
echo "<td>" . $row['estd'] . "</td>"; 
echo "</tr>";
}
?>
</tbody></table>
</div>
</div>
</div>
</body>
</html>

View the example in browser

Note: The link above and the select statement may return zero rows. This is only because the data available in the table agsinst which the query is executed, does not have a date present with respect to the current date. Otherwise, the query is technically correct.

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Next: MySQL JOINS Introduction INNER JOIN



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