Mysql RTRIM() function ~ Tech Blog

Mysql RTRIM() function

MySQL RTRIM() removes the trailing spaces of a string.

Syntax:

RTRIM(str)

Argument

Name	Description
str	A string whose trailing spaces are to be removed.

Example: MySQL RTRIM() function

The following MySQL statement returns a string after removing all the trailing spaces of the argument string 'w3resource'.

Code:

SELECT RTRIM('w3resource ');



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Sample Output:

mysql> SELECT RTRIM('w3resource ');
+----------------------+
| RTRIM('w3resource ') |
+----------------------+
| w3resource           | 
+----------------------+
1 row in set (0.01 sec)

Example of MySQL RTRIM() function using table

The following MySQL statement returns the name of the authors with removing trailing spaces from the publisher table and home city of those authors. The WHERE condition is used to make sure that authors only those who belong to the USA are retrieved.

Code:

SELECT RTRIM(aut_name),home_city 
FROM author 
WHERE country='USA';



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Sample table: author

Sample Output:

mysql> SELECT RTRIM(aut_name),home_city 
    -> FROM author 
    -> WHERE country='USA';
+-----------------+-----------+
| RTRIM(aut_name) | home_city |
+-----------------+-----------+
| Thomas Merton   | New York  | 
| Nikolai Dewey   | Atlanta   | 
| Joseph Milton   | Houston   | 
| Butler Andre    | Florida   | 
+-----------------+-----------+
4 rows in set (0.00 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-rtrim-function - php mysql examples | w3resource</title>
<meta name="description" content="example-rtrim-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>A list of Authors those who belong to USA. Second column shows the home city of the Author. Trailing spaces are removed from the right of the Author's name : </h2>
<table class='table table-bordered'>
<tr>
<th>Author's name</th><th>Home city</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 RTRIM(aut_name),home_city
FROM author
WHERE country="USA"') as $row) {
echo "<tr>";
echo "<td>" . $row['RTRIM(aut_name)'] . "</td>";
echo "<td>" . $row['home_city'] . "</td>";
echo "</tr>";
}
?>
</tbody></table>
</div>
</div>
</div>
</body>
</html>



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Tech Blog

Tuesday 10 July 2018