Why do spurious tuples occur in the result of joining the EMP_PROJ1 and EMP_ LOCS relations in
Question:
Why do spurious tuples occur in the result of joining the EMP_PROJ1 and EMP_ LOCS relations in Figure 14.5 (result shown in Figure 14.6)?
Figure 14.5
Figure 14.6
Transcribed Image Text:
Ssn Pnumber Hours Pname Plocation Ename 123456789 1 32.5 ProductX Bellaire Smith, John B. 123456789 1 32.5 ProductX Bellaire English, Joyce A. Smith, John B. English, Joyce A. 123456789 7.5 ProductY Sugarland 123456789 2 7.5 ProductY Sugarland Wong, Franklin T. Narayan, Ramesh K. Wong, Franklin T. 123456789 7.5 ProductY Sugarland 666884444 3. 40.0 ProductZ Houston 666884444 3 40.0 ProductZ Houston 453453453 1 20.0 ProductX Bellaire Smith, John B. 453453453 20.0 ProductX Bellaire English, Joyce A. 453453453 2 20.0 ProductY Sugarland Smith, John B. English, Joyce A. Wong, Franklin T. 453453453 2 20.0 ProductY Sugarland 453453453 20.0 Sugarland * 2 ProductY 333445555 10.0 ProductY Sugarland Smith, John B. 333445555 2 10.0 ProductY Sugarland English, Joyce A. Wong, Franklin T. Narayan, Ramesh K. Wong, Franklin T. 333445555 10.0 ProductY Sugarland 333445555 3. 10.0 ProductZ Houston * 333445555 3 10.0 ProductZ Houston Wong, Franklin T. Narayan, Ramesh K. Wong, Franklin T. 333445555 10 10.0 Computerization Stafford 333445555 20 10.0 Reorganization Houston 333445555 20 10.0 Reorganization Houston
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Related Book For
Fundamentals Of Database Systems
ISBN: 9780133970777
7th Edition
Authors: Ramez Elmasri, Shamkant Navathe
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