NULLS in PL/SQL:
- Represents unknown or inapplicable values
- Never equal or not equal to anything
- Most functions other than NVL, NVL2, CONCAT, REPLACE will return NULL when passed a Null
- Use IS null OR IS NOT NULL to check NULL values
- Represents unknown or inapplicable values
- Never equal or not equal to anything
- Most functions other than NVL, NVL2, CONCAT, REPLACE will return NULL when passed a Null
- Use IS null OR IS NOT NULL to check NULL values
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