September 2004
Beginner to intermediate
388 pages
6h 34m
English
Content preview from PROC SQL: Beyond the Basics Using SAS®
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1.4. Data Integrity
Webster’s New World Dictionary defines integrity as “the quality or state of being complete; perfect condition; reliable; soundness.” Data integrity is a critical element that every organization must promote and strive for. It is imperative that the data tables in a database environment be reliable, free of errors, and sound in every conceivable way. The existence of data errors, missing information, broken links, and other related problems in one or more tables can affect decision-making and information reporting activities resulting in a loss of confidence among users.
Applying a set of rules to the database structure and content can ensure the integrity of data resources. These rules consist of table and column constraints ...
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