What represents an empty field in a database?

Question

Empty or blank usually refers to an empty string value, length = 0 characters. Null means no value, not even an empty one. Show activity on this post. NULL is a database indicator that specifies that the value in the database is missing or indeterminate. 10 дек. 2012 г.

What does an empty field represent?

An empty Availability field indicates that the data sender does not know whether or not a field should contain a value.

Is an empty field NULL?

Null is an absence of a value. An empty string is a value, but is just empty. Null is special to a database.

What is a blank field in SQL?

A null database field means that there is no value for a given record. It indicates the absence of a value. A blank database field means that there is a value for a given record, and this value is empty (for a string value) or 0 (for a numeric value).

What represents no value in database?

A null value in a relational database is used when the value in a column is unknown or missing. A null is neither an empty string (for character or datetime data types) nor a zero value (for numeric data types).

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