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Define query optimization.
Query optimization refers to the process of search the lowest -cost method of evaluating a given query.
Consider the relations: PROJECT(proj#,proj_name,chief_architect) EMPLOYEE(emp#,emp_name) ASSIGNED(proj#,emp#) Use relational algebra to express the subsequent queries: (i) Get
Compute the closure (F+) for the following set of the functional dependencies defined on R(a,b,c,d), where F - {c→ a, ab → d, a → b, d → c}, i.e. what are all of the FDs implied b
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Identify the need and use of data control through problem solving, illustration
When a function module is activated syntax checking is performed automatically. YEs, a function module is activated syntax checking.
Table Handling In RDBMS more than one table can be tackled at a time by using join operation. Join operation is a relational operation that causes 2 tables with a common domai
What is RDBMS terminology for a row? A tuple is a RDBMS terminology for a row
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FDs in Entities : Student entity : Enrolment number → Student name, Address Course Entity :
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