When you enter a new row into a table or modify an existing row,the values for one or more columns can be unknown or unavailable.

Name: When you enter a new row into a table or modify an existing row,the values for one or more columns can be unknown or unavailable.
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Question

When you enter a new row into a table or modify an existing row,the values for one or more columns can be unknown or unavailable.​

Quizplus · Accepted Answer

This statement is true. It is possible to have unknown or unavailable values in one or more columns when entering or modifying a row in a table. These values can be represented as NULL values in the database.

When You Enter a New Row into a Table or Modify