Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
Consider the relations EMP(ENO,ENAME,AGE,BASIC_SALARY) WORK_IN(ENO,DNO) DEPT(DNO,DNAME,CITY) Express the following queries in SQL(i) Find names of employees who work in a deptt. in Delhi.(ii) Get the deptt. number in which more than one employee is working.(iii) Find name of employee who earns highest salary in ‘HR' department.
(i) select ENAME from EMP, WORK_IN, DEPT where EMP.ENo= WORK_IN.ENO and WORK_IN.DNO= DEPT.DNO and CITY= ‘Delhi'; (ii) select DNO from WORK_IN group by DNO having count(*) >1 (iii) select ENAME from EMP e where BASIC_SALARY >= (select max(BASIC_SALARY) from DEPT,WORK_IN where DNAME = ‘HR' and e.ENO = WORK_IN.ENO and WORK_IN. DNO= DEPT.DNO)
Which database object does not physically exist? A view database object does not physically exist.
What is Data dictionary? A data dictionary is a reserved space in a database that is employed to store information about the database itself. A data dictionary may consist o
10A.53 Code an Oracle Database trigger to enforce the constraint that an employee can never change his or her department. 10A.54 Code an Oracle Database trigger to allow the delet
How many types of users works on database? Users are differentiated through the way they expect to interact along with the system (i) Application programmers-interact with
Define the Query optimisation The query parser commonly generates a standard initial tree to correspond to an SQL query, with no doing any optimization. Such type of a canonica
Explain the Recoverable Schedule A recoverable schedule is one in which for each pair of transactions Ti and Tj such that Tj reads a data item formerly written by Ti, the comm
Problem 1 What is a Data Warehouse? Mention its advantages 2 Explain the Top-Down and Bottom-up Data Warehouse development Methodologies 3 What is Data Transformation? Ex
Critically evaluate the bulleted list of information-related items in this case study. How are each contradictory to the notion of being an information-literate knowledge worker?
ERD Diagram of Medical Recruitment Agency?
what is view?explain
Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!
whatsapp: +91-977-207-8620
Phone: +91-977-207-8620
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd