The expression1 and expression2 could be any number, text, constant value, or column value accessed through the select statement. The part of SQL query which contains the not equal operator is shown below, The Not Equal operator is also called as an inequality operator. The Not Equal in SQL is used along with the WHERE Clause in the SQL Statements to identify the records to be selected. Suffice to say, some sort of conditional data manipulation and access is achieved through the involvement of this operator along with the statements of SQL query. The query which we were discussing in the previous paragraph could be from the category of Data Query Language, which means the query execution will fetch some data from the table or Data Manipulation Language which means the query execution will change some data on the database. If they are not equal, the condition will evaluate to be true, and the given query will execute on the corresponding data set. It is a comparison operator of SQL and is used to check whether two expressions that are written on both the sides of the operator are the same or not. Here the not equal operator comes into the picture. Think of a situation when you want to access the data rows from the database table except the few ones, The Not Equal in SQL is the comparison operator in SQL language that is written inside the SQL statements, and used on two expressions, if both expressions are different then the evaluation result comes out to be true, accordingly either we can access or modify the data on the database.
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