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MySQL not equal to operator

MySQL not equal to (<>, !=) operator

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Description

MySQL Not equal is used to return a set of rows (from a table) after making sure that two expressions placed on either sides of the NOT EQUAL TO (<>) operator are not equal.

Syntax

<>, !=

MySQL Version : 5.6

Example : MySQL not equal to (<>) operator

The following MySQL statement will fetch the rows from the table publisher which contain publishers those who don't belong to the country USA.

SELECT pub_name,country,pub_city,estd 
FROM publisher 
WHERE country <>"USA";

Sample table : publisher

Output

example mysql not equal to

mysql> SELECT pub_name,country,pub_city,estd 
    -> FROM publisher 
    -> WHERE country <>"USA";
+------------------------------+-----------+-----------+------------+
| pub_name                     | country   | pub_city  | estd       |
+------------------------------+-----------+-----------+------------+
| BPP Publication              | India     | Mumbai    | 1985-10-01 | 
| New Harrold Publication      | Australia | Adelaide  | 1975-09-05 | 
| Ultra Press Inc.             | UK        | London    | 1948-07-10 | 
| Pieterson Grp. of Publishers | UK        | Cambridge | 1950-07-15 | 
| Novel Publisher Ltd.         | India     | New Delhi | 2000-01-01 | 
+------------------------------+-----------+-----------+------------+
5 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-not-equal-operator - php mysql examples | w3resource</title>
<meta name="description" content="example-not-equal-operator - 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 those who don't belong to USA, along with their country, city and date of establishment:</h2>
<table class='table table-bordered'>
<tr>
<th>Publisher</th><th>Country</th><th>City</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,country,pub_city,estd
FROM publisher
WHERE country <>"USA"') as $row) {
echo "<tr>";
echo "<td>" . $row['pub_name'] . "</td>";
echo "<td>" . $row['country'] . "</td>";
echo "<td>" . $row['pub_city'] . "</td>";
echo "<td>" . $row['estd'] . "</td>";
echo "</tr>";
}
?>
</tbody></table>
</div>
</div>
</div>
</body>
</html>

View the example in browser

Example : MySQL not equal to (!=) operator with AND using IN operator

The following MySQL statement will fetch the rows from the table book_mast which contain books not written in English and the price of the books are 100 or 200.

SELECT book_name,dt_of_pub,pub_lang,no_page,book_price
FROM book_mast
WHERE pub_lang!="English" AND book_price IN(100,200);

Sample table : book_mast

Output

mysql> SELECT book_name,dt_of_pub,pub_lang,no_page,book_price
    -> FROM book_mast
    -> WHERE pub_lang!="English" AND book_price IN(100,200);
+----------------------------------+------------+----------+---------+------------+
| book_name                        | dt_of_pub  | pub_lang | no_page | book_price |
+----------------------------------+------------+----------+---------+------------+
| Guide to Networking              | 2002-09-10 | Hindi    |     510 |     200.00 | 
| Environment a Sustainable Future | 2003-10-27 | German   |     165 |     100.00 | 
+----------------------------------+------------+----------+---------+------------+
2 rows in set (0.00 sec)

Example : MySQL not equal to ( !=) operator

This following MySQL statement will fetch the rows from the table book_mast which contain books not written in English and the price of the books are less than 100 or more than 200.

SELECT book_name,dt_of_pub,pub_lang,no_page,book_price
FROM book_mast
WHERE pub_lang!="English" AND book_price NOT BETWEEN 100 AND 200; 

Sample table : book_mast

Output

mysql> SELECT book_name,dt_of_pub,pub_lang,no_page,book_price
    -> FROM book_mast
    -> WHERE pub_lang!="English" AND book_price NOT BETWEEN 100 AND 200;
+----------------------------------+------------+----------+---------+------------+
| book_name                        | dt_of_pub  | pub_lang | no_page | book_price |
+----------------------------------+------------+----------+---------+------------+
| Advanced 3d Graphics             | 2004-02-16 | Hindi    |     165 |      56.00 | 
| Human Anatomy                    | 2001-05-17 | German   |      88 |      50.50 | 
| The Experimental Analysis of Cat | 2007-06-09 | French   |     225 |      95.00 | 
| Networks and Telecommunications  | 2002-01-01 | French   |      95 |      45.00 | 
+----------------------------------+------------+----------+---------+------------+
4 rows in set (0.00 sec)

Slideshow of MySQL Comparison Function and Operators

MySQL Comparison Function and Operators, slide presentation



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