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@@ -153,4 +153,4 @@ These components are −
- It is very important to understand that a NULL value is different than a zero value or a field that contains spaces. - It is very important to understand that a NULL value is different than a zero value or a field that contains spaces.
- A field with a NULL value is the one that has been left blank during a record creation. - A field with a NULL value is the one that has been left blank during a record creation.
# SQL Constraints 🚩