Answers to Selected Questions and Problems
Cost Resulting Set Rows Total I/O. Cost A A1 Full table scan EMPLOYEE. Select only rows with EMP_SEX=âFâ and EMP_AREACODE=â615â 8,000 8,000 190 8,000 A A2 SORT Operation 190 190 190 8,190 B B1 Index Scan Range of EMP_NDX1 370 370 370 370 B B2 Table Access by RowID ................
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