Question Description
DATA/FILE STRUCTURES
10 points
1. A table has 250,000 Customer records of fixed-length. Each row has the following columns:
NAME (20 bytes)
ID (9 bytes)
ADDRESS (40 bytes)
PHONE (9 bytes)
BIRTHDATE (8 bytes)
GENDER (1 byte)
PRODCODE (4 bytes)
DEPTCODE (4 bytes)
CATCODE (4 bytes)
BUYERPROGRAM (3 bytes)
An additional byte per row is used as a deletion marker.
a. Calculate the row (record) size R in bytes.
b. Calculate the table size (T) in bytes.
c. Assuming a 512 byte block, calculate the number of blocks required assuming a
spanned
block
organization. where each block uses a 5-byte pointer to the next block.
2. Create a B+-tree index for the following sequential data. Think about what you will need to do to create
the index. Make sure your index values are well balanced. Show the path that the system would take to find
the record for Norton:
Use Figure 5-7 in Chapter 5 on page 222 as a guide or the following link for assistance:
http://sqlity.net/en/2445/b-plus-tree/
Harshman
Douglass
Stokes
Keller
Wassef
Beck
Walker
Wehe
Daisley
Kolber
Fegley
Ainley
Banks
Siu
Bartter
Russell
Palermo
Rucker
Mclain
Shields
Maestas
Beasley
Vogel
Blackwelder
Kjeell
Silverberg
Condreay
Boklage
Bidwell
Oller
Calnin
Sanders
Rodriguez
Couto
Ladewig
Steinhauser
Khandpur
Beckstead
Fisher
Shaw
Pritchett
Harrison
Ray
Fudickar
Whiteley
Scheer
Wayman
Rembold
Shankar
Stokes
Goldstein
McIlwain
Trostle
Grulke
Kulbacki
Hager
Duval
Johnson
Holt
Jahnke
Berthold
Fortkamp
Wylie Biggs
Williams
Fenzel
Medders
Madding
Blake
Bytheway
Cimino
Coles
Mayer
Bolduc
Hughes
Hoem
McElvain
Krueger
Basnet
Megerdichian
Jones
O'Connell
Meyer
Norton
Wood
Bushell
Sears
Wilson-Ferry
Molatore
Sepich-
Anderson
Makens
Craig
Toma
Curtis
Walz
Taplin
Potter
Amen
Hadden
Smith
James
Zivich
Booth
Ducharme
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