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17 lines
1.3 KiB
Markdown
# SQL Logical Operators
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SQL Logical Operators evaluate boolean conditions to filter data, primarily used in `WHERE` and `HAVING` clauses. They are fundamental for constructing precise data retrieval queries and controlling program flow based on dataset characteristics. Understanding their behavior is essential for writing effective and performant database interactions.
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## Logical Operator Keywords
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| Logical Operator | Explanation |
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| :--------------- | :----------------------------------------------------------------- |
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| ALL | Returns TRUE if all comparisons in a subquery are TRUE. |
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| ANY | Returns TRUE if any comparison in a subquery is TRUE. |
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| AND | Returns TRUE if both boolean expressions are TRUE. |
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| EXISTS | Evaluates to TRUE if the subquery returns one or more rows. |
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| IN | Checks if a value matches any value in a list or subquery. |
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| BETWEEN | Tests if a value is within a given range (inclusive). |
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| NOT | Negates a boolean expression. |
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| OR | Returns TRUE if either boolean expression is TRUE. |
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