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randomly sampled value 295
range queries 203
range sum 203
raw data (microdata) 254
relational algebra 118
relational calculus 118
Relational OLAP (ROLAP) 202
Relative Prefix Sum (RPS) 204
representation levels 31
representation spaces 31
retrieved database 378
rewritten query 270
roll-up 127, 283, 405
roll-up operation 55
roll-up operator 107
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