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“Victims Seeking Cheap Online Erotica Aroused by Not-So-Cheap Phone Bills,” San Jose Mercury News, Feb. 20, 1997, p. 1C. Wasserman, T., “Retailers, OSPs Race to Secure Online Sales,” Computer Retail Week 7(160):6-7, Jan. 6, 1997. Wingfield, N., “Netscape Joins Fray with...
The intuition behind the estimated value of the reasoner operation costs is that the evaluation of possible instances is much more costly than the evaluation of known instances since possible instances require expensive consistency checks whereas known instances require cheap cache lookups. The estimated ...
the set of rows that need to be processed in subsequent joins is likely to be small and, therefore, those subsequent joins are likely to be cheap. In the example, customer table504with a derived cardinality of 1 and four rows, has a single table selectivity of 25%, and the sales associ...