MySQL concat() function
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Description
MySQL CONCAT() function is used to add two or more strings. It will return non-binary strings when all the strings are non-binary and return binary string when any of the specified string is binary. A numeric argument is also converted in its equivalent binary string form. It can be avoided by using an explicit type CAST.
Syntax
CONCAT (string1, string2,…)
Arguments
| Name | Description |
|---|---|
| string1 | First string to be joined. |
| string2 | Second string to be joined. Up to N number of strings can be specified this way. |
Pictorial representation of MySQL concat() function
Example of MySQL concat() function
Code
SELECT CONCAT('Use',' MySQL');
Explanation
The above MySQL statement will add two strings given in the argument and returns "Use MySQL" string.
Output
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Example of MySQL concat() function on columns
Sample table : publisher
Code
SELECT CONCAT(pub_city,'--> ',country) FROM publisher;
Explanation
The above MySQL statement will add values of pub_city column with values of country column of publisher table placing a '-->' between them.
Output
-example.gif)
PHP script
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"> <html xmlns="http://www.w3.org/1999/xhtml">
<head> <meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" /> <title>example-concat-function - php mysql examples | w3resource</title> </head> <body> <?php echo "<h2>list of publisher's city and country with 'publisher's city--->country' format : </h2>"; echo "<table border='1' style='border-collapse: collapse;border-color: silver;'>"; echo "<tr style='font-weight: bold;'>"; echo "<td width='250' align='center'>Publisher's city</td>"; echo "</tr>"; include("../dbopen.php"); $result = mysql_query('SELECT CONCAT(pub_city,"--> ",country) FROM publisher'); while($row=mysql_fetch_array($result)) { echo "<tr>"; echo "<td align='center' width='200'>" . $row['CONCAT(pub_city,"--> ",country)'] . "</td>"; echo "</tr>"; } echo "</table>"; ?> </body> </html>
