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Consider the following relations:
S (S#, SNAME, STATUS, CITY)
SP (S#, P#, QTY)
P (P#, PNAME, COLOR, WEIGHT, CITY)
Give an expression within SQL for each of queries below:
(i) Get supplier names for supplier who supply at least one red part
(ii) Get supplier names for supplier who do not supply part P2.
(i) SELECT SNAME FROM S
WHERE S# IN (SELECT S# FROM SP
WHERE P# IN (SELECT P# FROM P
WHERE COLOR = RED'))
(ii) SELECT SNAME FROM S
WHERE S# NOT IN (SELECT S# FROM SP WHERE P# = 'P2')
State the Steps of Object Design Object design is a very iterative process in which various classes, relationships among objects are added when you move from one level to
Using your cache simulator and using smalltex.din as your memory trace determine the total miss rate, compulsory miss rate, capacity miss rate, and conflict miss rate for the follo
What are the benefits of prepared statements and place holders? Parameter binding operations automatically handle escaping of characters Encourage Statement reuse
A database to track your progress in your college program will track your progress towards graduation! A database that has information containing the classes that you have taken, c
Define in which normalisation form if an attribute of a composite key is dependent on an attribute of other composite key. Ans: 3NF A relation is in 3 NF if an attribute of
OBJECTIVES After going through this unit you should be capable to: Explain the File Based system and its limitations; Explain the structure of DBMS; Explain the
what is definition hierarchical data model
QUESTION (a) Consider a car database consisting of car model, car make, car origin, Engine capacity, color, cost.
Explain briefly concurrent task by taking an example. Concurrent Task- The concurrent occurrence of more than one event is called concurrent task. Operating systems can handl
What is a SELECT operation? The select operation selects tuples that please a given predicate. We use the lowercase letter σ to denote selection.
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