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Convert the following ER - diagram (Entity Relationship Diagram) into a relational database (the primary keys are underlined):
Ans: The relational database schema for the following ER diagram is like this:
A (a1, b1, a2, a3)
B (b1, b2, b3, b4)
C (c1, c2)
D (b1, c1, r21)
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What is the difference between WHERE and HAVING clauses?. Predicates in the WHERE clause applies to every tuple while the predicate in the HAVING clause applies to groups.
Draw entity relationship diagram for the following scenario. A university has many departments whereas each department belongs to that particular uni. That uni has also many bui
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Illustrate different types of Locks in SQL Server. There are three kinds of locks in SQL Server i.) Shared locks - These are used for operations which don't allow any update
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