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Mastering PostgreSQL Databases: From Basics to Advanced

Logical Operators in SQL

Explore how logical operators such as AND, OR, NOT, ANY, and ALL are used in SQL to combine and evaluate multiple conditions in queries. Understand their syntax and practical examples to filter and retrieve data precisely in PostgreSQL databases.

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Logical operators

Logical operators are used to combine two or more conditions. A table containing the list of logical operators in SQL is given below:

List of Logical Operators

Operator

Meaning

AND

Returns TRUE if all of the conditions are true

OR

Returns TRUE if one or more of the conditions are true

NOT

Returns TRUE if a condition is false

ANY

Returns TRUE if any of the subquery values meet the condition

ALL

Returns TRUE if all of the subquery values meet the condition

Note: Operators in SQL are not case-sensitive.

The AND operator

The AND operator is used to select rows based on multiple conditions. The AND operator will return all the rows where all the conditions are met. An example of using the AND operator ...