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Chapter – 8 . STRUCTURED QUERY LANGUAGE

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WORKERS

W_ID FIRSTNAME LASTNAME ADDRESS CITY
102 Sam Tones 33 Elm St. Paris
105 Sarah Ackerman 44 U.S.
144 Manila Sengupta 24 FriendsStreet New Delhi
210 George Smith 83 First Street Howard
255 Mary Jones 842 Vine Losantiville
300 Robert Samuel 9 Fifth Cross Washington
335 Henry Williams 12 Moore Street Boston

DESIG
W_ID SALARY BENEFITS DESIGINATION
102 75000 15000 Manager
105 85000 25000 Director
144 70000 15000 Manager
210 75000 12500 Manager
255 50000 12000 Clerk
300 45000 10000 Clerk
335 40000 10000 Clerk
400 32000 7500 Salesman
451 28000 7500 Salesman

(i) To display W_ID Firstname, address and City of all employees living in New York from the 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
Sam 75000
Manila 70000
George 75000

(vi) SELECT COUNT(DISTINCT DESIGNATION) FROM DESIGN ;

Ans. 4

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Computer Science By Mr. MRK