CBSE Computer Science - Revision Tour(Solved) CBSE Guess > eBooks > Class XII > CBSE Computer Science Structure Query Language Solved Revision Tour By Mr. Ravi Kiran COMPUTER SCIENCE STRUCTURED QUERY LANGUAGE (v) SELECT FIRSTNAME,SALARY FROM EMPLOYEES,EMPSALARY WHERE DESTINATION =’Salesman’AND EMPOLYEES.EMPID=EMPSALARY.EMPID ; Ans: Firstname Salary (vi) SELECT COUNT (DISTINT DESIGNATION ) FROM EMPSALARY Ans: 4 (vii) SELECT DESIGNATION , SUM(SALARY) FROM EMPSALARY GROUP BY DESIGNATION HAVING COUNT(*)>2; Ans: Designation Sum(Salary) (viii) SELECT SUM (BENEFITS) FROM EMPSALARY WHERE DESIGNATION=’Clerk’; Ans: 32000 OUTSIDE DELHI 2005: 5) Consider the following tables WORKERS and DESIG. Write SQL commands for the statements (i) to (iv) and give outputs for SQL queries (v) to (viii). WORKERS
(i) To display W_ID Firstname, address andCity of all employees living in New York fromthe Table WORKERs Ans: select W_ID ,firstname,address,city from workers where city=”New York” (ii) To display the content of workers table in ascending order of LASTNAME. Ans:Select * from Worker Order By lastname Asc (iii) To display the FIRSTNAME, LASTNAME and Total Salary of all Clerks from the tables WORKERS And DESIG, where Total salary is calculated as Salary + benifts. Ans: Select firstname, lastname, salary+benefits where worker.w_id=desg.w_id and Designation=”Clerk” (iv) To display the minimum salary among managers and Clerks from the tables DESIG. Ans: (Try This Answer) (v) SELECT FIRSTNAME, SALARY FROM WORKERS, DESIG WHERE DESIGINATION = “MANAGER” AND WORKERS.W_ID = DESIGN.W_ID Ans: FIRSTNAME SALARY (vi)SELECT COUNT(DISTINCT DESIGNATION) FROM DESIGN ; Ans: 4 (vii) SELECT DESIGNATION, SUM(SALARY) FROM DESIG GROUP BY DESIGNATION HAVING COUNT (*) < 3; Ans: Designation Sum(Salary) (viii) SELECT SUM(BENIFTS) FROM DESIG WHERE DESIGINATION =”salesman”; Ans: 15000
CBSE Computer Science Solved Revision Tour By Mr. Ravi Kiran ( [email protected] ) |
|