Logical Functions¶
SQL Function | Return Type | Description |
|---|---|---|
boolean1 OR boolean2 | BOOLEAN | Returns TRUE if boolean1 or boolean2 is TRUE. Supports three-valued logic. For example, true || Null(BOOLEAN) returns TRUE. |
boolean1 AND boolean2 | BOOLEAN | Returns TRUE if both boolean1 and boolean2 are TRUE. Supports three-valued logic. For example, true && Null(BOOLEAN) returns UNKNOWN. |
NOT boolean | BOOLEAN | Returns TRUE if the boolean value is FALSE; returns FALSE if the boolean value is TRUE; returns UNKNOWN if the boolean value is UNKNOWN. |
boolean IS FALSE | BOOLEAN | Returns TRUE if the boolean value is FALSE; returns FALSE if boolean is TRUE or UNKNOWN. |
boolean IS NOT FALSE | BOOLEAN | Returns TRUE if boolean is TRUE or UNKNOWN; returns FALSE if boolean is FALSE. |
boolean IS TRUE | BOOLEAN | Returns TRUE if boolean is TRUE; returns FALSE if boolean is FALSE or UNKNOWN. |
boolean IS NOT TRUE | BOOLEAN | Returns TRUE if boolean is FALSE or UNKNOWN; returns FALSE if boolean is TRUE. |
boolean IS UNKNOWN | BOOLEAN | Returns TRUE if the boolean value is UNKNOWN; returns FALSE if boolean is TRUE or FALSE. |
boolean IS NOT UNKNOWN | BOOLEAN | Returns TRUE if boolean is TRUE or FALSE; returns FALSE if the boolean value is UNKNOWN. |