Null represents a lack of data. In databases, it is used to denote missing or irrelevant information. Think of it as a placeholder that tells the database there’s supposed to be something here, but it’s currently empty or undefined.
Null represents a lack of data. In databases, it is used to denote missing or irrelevant information. Think of it as a placeholder that tells the database there’s supposed to be something here, but it’s currently empty or undefined.