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home / developersection / forums / what is the significance of the not operator in sql and how is it used in conditional statements?
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What is the significance of the NOT operator in SQL and how is it used in conditional statements?

Revati S Misra 446 04 Jul 2023

What is the significance of the NOT operator in SQL and how is it used in conditional statements?

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Updated 05 Jul 2023
Revati S Misra
Revati S Misra

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Skilled in SEO, content writing, and digital marketing. Completed several years of working in many organizations including multinational companies. I love to learn new things in life that keep me motivated.

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1 Answers

Aryan Kumar
Aryan Kumar 05 Jul 2023
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The NOT operator in SQL is a logical operator that negates the value of a condition. The NOT operator can be used to reverse the meaning of a conditional statement.

The NOT operator has the following syntax:

SQL

NOT condition;

The condition can be any expression, including literal values, column names, or function calls. The NOT operator will return TRUE if the condition is FALSE, and FALSE if the condition is TRUE.

Here is an example of how the NOT operator can be used:

SQL

SELECT customer_name
FROM customers
WHERE NOT age < 18;

This query will select the customer_name column from the customers table. The NOT operator will be used to reverse the meaning of the condition age < 18. This means that the query will only select customers who are 18 years old or older.

Here is another example of how the NOT operator can be used:

SQL

SELECT product_name
FROM products
WHERE NOT price > 100;

This query will select the product_name column from the products table. The NOT operator will be used to reverse the meaning of the condition price > 100. This means that the query will only select products that are priced at 100 or less.

The NOT operator can be used in a variety of ways to reverse the meaning of a conditional statement in SQL. It is a powerful tool that can be used to filter data, or to control the flow of a query.

Here are some other examples of how the NOT operator can be used:

  • To select customers who are not under 18 years old.
  • To select products that are not priced over 100.
  • To select orders that are not placed today.
  • To select employees who are not on vacation.

The NOT operator is a versatile tool that can be used in a variety of ways to reverse the meaning of a conditional statement in SQL.

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