_________________________________ record structures allow different records in the same file to have different lengths.
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Q227: A primary key might be created by
Q228: A single file in a database may
Q229: _ keys are pointers to the records
Q230: A(n) _ is a collection of fields
Q231: Most database technologies impose a(n) _ record
Q233: When a computer program "reads" a record
Q234: A(n) _ factor is the number of
Q235: A(n) _ is the set of all
Q236: _ files or tables contain records that
Q237: _ files or tables contain records that
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