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Databases
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serve clients
via SQL by
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Sharing a
Model (The Schema)
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A query
language over the model
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the SQL interface
enables
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independence
of
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application
development
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DBMS
technology development
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reuse of
infrastructure
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Today
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most new
systems use a
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DBMS for data
storage
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even with less
performance,
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inability to
handle all problems,
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but enough of
them well enough.
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