Câu 6: C2090-614: DB2 10.1 Advanced DBA for Linux UNIX and Windows

Which statement about value compression is correct?

1. A. To use value compression, you must have a license for the DB2 Storage Optimization Feature.
2. B. Value compression uses a page-level dictionary-based compression algorithm to compress data based on repetition of values found in a single column.
3. C. Value compression involves removing duplicate entries for a value, only storing one copy, and keeping track of the location of any references to the stored copy. — đáp án hiện tại
4. D. When value compression is used, the byte count of compressed NULLs, zeros, and blanks might be larger than that of the uncompressed version of the same