MySQL concat() function
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. |
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;
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>
<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>
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