Examlex
Use the laws of logarithms to expand the expression. Select the correct answer.
Null
A value used in databases to represent missing or undefined data.
City field
A specific field in databases or forms designated for entering or displaying a city's name.
Null Values
Special markers in databases designated for fields with unknown or inapplicable information.
Is Null
A condition used in SQL to check for empty fields in a database.
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