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Question 47/72
You are using Hybrid Columnar Compression for a table stored in a tablespace that is contained in an Exadata-based ASM diskgroup. Identify three statements that correctly explain where the compression and decompression can be done.
Correct Answer: A,C,D
Explanation/Reference:
* decompression
/Queries run directly on Hybrid Columnar Compressed data does not require the data to be decompressed
/Data that is required to satisfy a query predicate does not need to be decompressed; only the columns and rows being returned to the client are decompressed in memory
/The decompression process typically takes place on the Oracle Exadata Storage Server in order to maximize performance and offload processing from the database server.
* decompression
/Queries run directly on Hybrid Columnar Compressed data does not require the data to be decompressed
/Data that is required to satisfy a query predicate does not need to be decompressed; only the columns and rows being returned to the client are decompressed in memory
/The decompression process typically takes place on the Oracle Exadata Storage Server in order to maximize performance and offload processing from the database server.
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