Hybrid Columnar Compression (HCC) is an advanced compression technology introduced by Oracle, particularly designed for environments like Oracle Exadata.
Unlike traditional row-major format databases, HCC organizes data in a column-major format within storage units known as Compression Units (CUs).
This format allows Oracle to compress data more efficiently, improving both storage utilization and query performance, especially for read-heavy operations such as data warehousing and archiving.
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