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Differentiate between a unique key and a primary key.
- By default, clustered index on column are created by primary key while nonclustered index are created by unique key.
- Primary key doesn't allow NULLs however unique key allows one NULL.
Having Clause with sub queries: First we have to recollect the GROUP BYclause. The following query searches the minimum salary in every department. SELECT DEPTNO, MIN (SAL)
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Draw an EER diagram that captures the "is-a" hierarchy of students in another simple database. The database captures both the "basic" information (say, student ID and student name)
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Which is another name for weak entity? Child is another name of weak entity.
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Birla Institute of Technology & Science, Pilani Work-Integrated Learning Programmes Division Second Semester 2012-2013 EC-1 Assignment 2 (7.5% of the grade) Course No. : SS ZG
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