DATABASE SYSTEM CONCEPTS (LOOSELEAF)
7th Edition
ISBN: 9781260515046
Author: SILBERSCHATZ
Publisher: MCG
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Chapter 2, Problem 11E
Program Plan Intro
Primary Key:
- A primary key is a special column of a relation used for uniquely identifying a relation.
- The primary key can be one column or combination of columns. The primary key will uniquely identify all the records of a table.
- The features of a primary are:
- The primary key contains a unique value for each row of data.
- The primary key column cannot contain null values.
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1.[30 pts] Computers generate color pictures on a video screen or liquid crystal display by
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three different lights, each of which can be turned on or off, projecting onto a glass screen:
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sources R,G and B:
R
G
B
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0
0
0
Black
0
0
1
Blue
0
1
0
Green
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1
1
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0
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Red
1
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1
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1
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0
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1
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Λ
1. Red(100) ^ Magenta(101)= Blue(001)
2. Bue(001) | Green(010)=
3. Yellow(100) & Cyan(011)=
2.[30 pts] Perform the following…
Chapter 2 Solutions
DATABASE SYSTEM CONCEPTS (LOOSELEAF)
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