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This is not a
generic zip-style compression
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Not all tables
will have good compression
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Compression
algorithm guarantees that
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compression
will never increase size of table
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Most large DW
tables seem to compress well
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Compression
happens between column/row
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values, not
within column/row values
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Long
character strings are not compressed unless
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the exact same
string appear multiple times
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LOB/BLOB
columns are not compressed
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