E4.6 Consider the following relation with sample data. DEPARTMENT OF TRANSPORTATION (DOT) PROJECT TABLE ProjectID ProjectName CountyID CountyName ProjectManagerID ProjectManagerName ProjectMilesWithinCounty 1 Road X 1 Wilson M1 Bob 10.00 1 Road X 2 Ottawa M1 Bob 17.00 1 Road X 3 Davis M1 Bob 12.00 2 Road Y 3 Davis M2 Sue 23.00 3 Bridge A 1 Wilson M3 Lee 0.50 3 Bridge A 2 Ottawa M3 Lee 0.30 4 Tunnel Q 2 Ottawa M1 Bob 2.00

E4.6 Consider the following relation with sample data. DEPARTMENT OF TRANSPORTATION (DOT) PROJECT TABLE ProjectID ProjectName CountyID CountyName ProjectManagerID ProjectManagerName ProjectMilesWithinCounty 1 Road X 1 Wilson M1 Bob 10.00 1 Road X 2 Ottawa M1 Bob 17.00 1 Road X 3 Davis M1 Bob 12.00 2 Road Y 3 Davis M2 Sue 23.00 3 Bridge A 1 Wilson M3 Lee 0.50 3 Bridge A 2 Ottawa M3 Lee 0.30 4 Tunnel Q 2 Ottawa M1 Bob 2.00

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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Concept explainers

Control structures

Control structures are block of statements that analyze the value of variables and determine the flow of execution based on those values. When a program is running, the CPU executes the code line by line. After sometime, the program reaches the point where it has to make a decision on whether it has to go to another part of the code or repeat execution of certain part of the code. These results affect the flow of the program's code and these are called control structures.

Switch Statement

The switch statement is a key feature that is used by the programmers a lot in the world of programming and coding, as well as in information technology in general. The switch statement is a selection control mechanism that allows the variable value to change the order of the individual statements in the software execution via search.

Question

Questions is attached - Only E, F and G

E4.6 Consider the following relation with sample data.
DEPARTMENT OF TRANSPORTATION (DOT) PROJECT TABLE
ProjectID
ProjectName
CountyID
CountyName
ProjectManagerID
ProjectManagerName
ProjectMilesWithinCounty
1
Road X
1
Wilson
M1
Bob
10.00
1
Road X
2
Ottawa
M1
Bob
17.00
1
Road X
3
Davis
M1
Bob
12.00
2
Road Y
3
Davis
M2
Sue
23.00
3
Bridge A
1
Wilson
M3
Lee
0.50
3
Bridge A
2
Ottawa
M3
Lee
0.30
4
Tunnel Q
2
Ottawa
M1
Bob
2.00

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