Which of the following techniques is NOT employed by Big SQL to improve performance?

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Which of the following techniques is NOT employed by Big SQL to improve performance?
A . Query Optimization
B . Predicate Push down
C . Compression efficiency
D . Load data into DB2 and return the data

Answer: A

Explanation:

Reference: https://www.ibm.com/support/knowledgecenter/en/SSZLC2_7.0.0/com.ibm.commerce.developer.soa.doc/refs/rsdperformanceworkspaces.htm