When choosing the dimensions for an MDC table, poor space utilization can occur due to low cell density. What can cause an MDC table to use much more space?
The good answer is "High Cardinality".
Indeed, Columns that are involved in equality or range predicate queries, and especially columns with low cardinalities, show the greatest benefit from clustering dimensions.
REFERENCE : https://www.ibm.com/support/knowledgecenter/SSEPGG_11.1.0/com.ibm.db2.luw.admin.partition.doc/doc/c0007238.html
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db2tester
4 years, 12 months ago