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Why is Parquet commonly used for analytical data?

  1. A It is columnar, so queries read only referenced columns and compression is highly effective
  2. B It is human readable
  3. C It supports transactions natively
  4. D It is faster to write than CSV
Answer

It is columnar, so queries read only referenced columns and compression is highly effective

Predicate pushdown also allows the reader to skip row groups entirely based on column statistics stored in the file.

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