January 2003
Intermediate to advanced
300 pages
15h 18m
English
Content preview from Data Quality
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3.1 Initial Data Entry 49
become enormously reliable over the years. However, database errors do
occur because of" system problems when the transaction systems are not prop-
erly designed.
Database systems have the notion of COMMIT. This means that changes
to a database system resulting from an external transaction either get com-
pletely committed or completely rejected. Specific programming logic ensures
that a partial transaction never occurs. In application designs, the user is gen-
erally made aware that a transaction has committed to the database.
In older systems, the transaction path from the person entering ...
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