![]() When working with databases, it's common to encounter NULL values, which represent missing or unknown data. However, the symbol is not recognized as a valid operator in some versions of SQL, so it's important to use the != symbol instead. This is a common source of confusion for beginners, who may mistakenly use the symbol instead. Note that the NOT EQUAL operator is represented by the != symbol in SQL. This query will return all employees who have a salary that is not equal to $50,000, including those with salaries less than and greater than $50,000. However, if you want to exclude these employees and only see those who do not have a salary greater than $50,000, you can use the NOT EQUAL operator, like this: SELECT * FROM employees WHERE salary != 50000 This query will return all employees who have a salary greater than $50,000. You can use the NOT EQUAL operator with the greater than operator (>), like this: SELECT * FROM employees WHERE salary > 50000 These operators allow you to define specific criteria for the data that you want to include or exclude from your query results.įor example, suppose you have a table of employees and you want to find all employees who do not have a salary greater than $50,000. When filtering data with SQL, the NOT EQUAL operator can be used in combination with other comparison operators such as =,, =. Using SQL NOT EQUAL With Multiple Criteria.Using SQL NOT EQUAL With Basic Operators.The NOT EQUAL operator allows you to filter out data that does not match a particular value or set of values. SQL provides a variety of operators for filtering data, including the NOT EQUAL operator (!=). One of the most common tasks when working with databases is filtering data based on specific criteria. If you have any questions, please feel free to ask them in our comments section, and our experts will promptly answer them for you.Structured Query Language (SQL) is a powerful tool for managing and analyzing data. From structuring your database correctly to authoring efficient SQL statements and clauses, and managing your SQL database for scalable growth, get great work-ready training on SQL and it’s multitude of applications at work. Taking this SQL certification course will equip you with all that you need to work with SQL databases and use them in your applications. If you wish to learn more about SQL, then check out our SQL certification course. Equality operator improves the performance of the SQL query. Through this article, you have now gained a solid understanding of SQL Not equal Operator, along with pertinent examples. Gain expertise in the latest Business analytics tools and techniques with the Post Graduate Program in Business Analysis. The city whose sum of points is equal to 3220 is excluded from the results. SQL Not operator can also be used with the combination of GROUP BY and HAVING clause in the following way: The statement given above will produce the following results.Įxample 4: SQL Not operator and SQL Group By clause We can specify multiple conditions for Not operator using the WHERE clause. The above query will produce all the results where the name is not equal to Joe.īoth the query will produce the same result.Įxample 3: Specifying multiple conditions using SQL Not Operator SELECT * FROM customers WHERE name != ‘Joe’ Note: “!=” and “” both will give the same results. For example, 15 != 17 comparison operation uses SQL Not Equal operator (!=) between two expressions 15 and 17. The SQL Not Equal comparison operator (!=) is used to compare two expressions. When the expressions return different types of data, (for example, a string and a number), type conversion is performed. When both SQL expressions are not equal, this operator returns 1 and when they are equal, it returns 0, and when either expression is NULL, it returns NULL. In this article, we will look into the following topics. One such operator is SQL Not Equal, which we will discuss in this article. These operators are used to enumerate conditions in an SQL statement, and to serve as conjunctions for multiple conditions in a statement. A comparison operator is a reserved word used in an SQL statement WHERE clause to compare the two elements.
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