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(Solved by Expert Tutors) Let our database be:Employee {EmpId, DeptId, Salary, Sex, DOB}The>


following statistics are stored in the DBMS's system tables: oThere are 10000 rows in the table.oThere are 20 departments in the company.oSex is either 'M' or 'F'.oThe lowest salary is 20,000 and the highest is 100,000. oFlat distributions of data values in columnsWhat is the selectivity of the following minters?oSALARY < 35000o((SEX= 'M' AND DEPT = 'HR') OR(SEX= 'F' AND DEPT ='Software')) AND (SALARY > 50000 OR SALARY < 25000)

 


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Apr 19, 2020

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