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12 cards from this deck
Same info repeated multiple times in a database table
Same info stored differently, creating conflicting data
Multiple smaller tables that are connected to each other
Field that uniquely identifies each record in a table
Field in one table that refers to primary key in another
Data redundancy and data inconsistency
Wastes storage space and creates maintenance problems
Creates conflicting and unreliable data
Each piece of info stored in only one place
Only need to update in one place, applies to all
Connect tables by referencing primary keys in other tables
Each value is unique - no two records can have the same
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