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: 8.0
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)
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
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
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
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