Difference between revisions of "SQL Predicates"
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Predicates are special operators. They are used to evaluate an expression and return True (.T.), False (.F.) or Unknown (.NULL.). | Predicates are special operators. They are used to evaluate an expression and return True (.T.), False (.F.) or Unknown (.NULL.). | ||
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!Predicate||Description | !Predicate||Description | ||
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Revision as of 13:52, 21 January 2013
Purpose
Special operators
See Also
Description
Predicates are special operators. They are used to evaluate an expression and return True (.T.), False (.F.) or Unknown (.NULL.).
| Predicate | Description |
|---|---|
| BETWEEN | Evaluate whether an expression is between two other expressions. |
| IN | Evaluate whether an expression matches one of a set of values. |
| LIKE | Evaluate whether an expression is like another expression |
| NULL | Evaluate whether an expression is equal to .NULL. |
