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Typically, the new moon's shadow _______ a solar eclipse
Null
A value used in databases and programming to represent the absence of a value or a 'nothing' state.
Zero-Length
A term that refers to a string or text field that is allowed to have no characters, essentially being empty but not null.
Multivalued
Describes an attribute or field in a database that can hold multiple values in a single record.
Lookup List
A pre-defined list of values that can be selected within a form or database field.
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