MySQL not equal to (<>, !=) operator
not equal to (<>, !=) operator
MySQL Not equal is used to return a set of rows (from a table) after making sure that two expressions placed on either side 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.
Code:
SELECT pub_name,country,pub_city,estd
FROM publisher
WHERE country <>"USA";
Relational Algebra Expression:

Relational Algebra Tree:

Sample table: publisher
Output:

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=1.0">
<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>
JSP script:
<%@page contentType="text/html" pageEncoding="UTF-8"%>
<%@ page import="java.sql.*" %>
<%@ page import="java.io.*" %>
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>example-not-equal-operator</title>
</head>
<body>
<%
try {
Class.forName("com.MySQL.jdbc.Driver").newInstance();
String Host = "jdbc:MySQL://localhost:3306/w3resour_bookinfo";
Connection connection = null;
Statement statement = null;
ResultSet rs = null;
connection = DriverManager.getConnection(Host, "root", "datasoft123");
statement = connection.createStatement();
String Data ="SELECT pub_name,country,pub_city,estd FROM publisher WHERE country <>'USA'";
rs = statement.executeQuery(Data);
%>
<TABLE border="1">
<tr width="10" bgcolor="#9979">
<td>Publisher</td>
<td>Country</td>
<td>City</td>
<td>Date of establishment</td>
</tr>
<%
while (rs.next()) {
%>
<TR>
<TD><%=rs.getString("pub_name")%></TD>
<TD><%=rs.getString("country")%></TD>
<TD><%=rs.getString("pub_city")%></TD>
<TD><%=rs.getString("estd")%></TD>
</TR>
<% } %>
</table>
<%
rs.close();
statement.close();
connection.close();
} catch (Exception ex) {
out.println("Can’t connect to database.");
}
%>
</body>
</html>
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.
Code:
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
Sample 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.
Code:
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
Sample 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
Previous: NOT BETWEEN AND
Next: NOT IN()
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