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Consider the following relations and write down expressions for the following queries:

EMP (eid, ename, age, address, salary)

Works (eid, did, hours)

Dept (did, dname, managerid)

  1. List the names of employees who work for the ‘Research’ department for 8 hours using Relational Algebra.
  2. List the name and address of all employees with department number 5 using Relational Calculus.
  3. Find the managerid of managers who manage only departments with budgets greater than 1 lac using SQL.
  4. Find the employee who has highest salary using SQL.
Added 3 years ago
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Database Management System Computer Science & Engineering
Ans

 

  3. Insufficient information. We are just assuming the Relation Works as Works (eid, did, hours, budget).

    Hence the answer will be as follows:

     

     



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