postgresqlHow can I use the NOT EQUAL operator in PostgreSQL?

The NOT EQUAL operator in PostgreSQL is used to compare two values and return a boolean value based on whether or not the values are equal. The operator is written as != and is used in a WHERE clause to filter results.

For example, the following query will return all rows from the users table where the name column does not equal John:

SELECT * FROM users WHERE name != 'John';

The code above consists of the following parts:

1. SELECT * - This part of the query selects all columns from the users table.
2. FROM users - This part of the query specifies the table from which the data should be retrieved.
3. WHERE name != 'John' - This part of the query uses the NOT EQUAL operator to filter the results and only return rows where the name column does not equal John.

For more information on the NOT EQUAL operator in PostgreSQL, please refer to the PostgreSQL Documentation.

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