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资源说明：Basic Table Compression
•Introduced in Oracle Database 9i Release 2
–Compression during bulk load operations (Direct Load, CTAS)
–Data modified using conventional DML not compressed
•Improved performance for queries accessing large amounts of data
–Fewer I/Os
–Buffer Cache efficiency
•Data is compressed at the database block level
•Compression enabled at either the table or partition level
•Completely transparent to applications
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