Examlex
A bird can sit harmlessly on a high-voltage wire because
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.
Data Type
A classification identifying the type of data that can be held by a column in a database or a variable in programming, such as integer, text, or boolean.
Filter by Form
A method in database applications that allows users to specify criteria in a form-like interface to filter and display only matching records.
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