U
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2:
C
REATING
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YSTEMS TO
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ANAGE
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NFORMATION
Pearson BTEC International Level 3 Qualifications in Information Technology –
Specification – Issue 3 – September 2022 © Pearson Education Limited 2022
44
Learning aim B: Design a relational database to meet client requirements
B1 Relational database design
Selection of RDBMS and SQL software, tools, techniques and processes.
•
Database design: conceptual, logical and physical
modelling and entity
relationship modelling.
•
Relational algebra: one to many, one to one, many to many, AND, OR, NOT, >, <,
≥, ≤
.
•
RDMS and SQL software selection.
•
Application design: user interface, software applications.
•
Database implementation techniques:
o
prototyping
o
data
conversion
o
testing.
•
Quality, effectiveness and appropriateness of the solution:
o
correctness
of data
o
relationships between data
o
data integrity
o
normalisation.
B2 Design documentation
The features and characteristics of relational database design techniques and their
application to solve problems:
•
Requirements of the brief (audience, purpose and client’s requirements)
•
Security and legal considerations
o
data protection legislation.
•
Data structure designs
o
data dictionaries and their use:
–
tables
–
field attributes
–
validation
o
use of naming conventions
o
entity relationship diagrams
o
normalisation.
•
User interface
design
o
data entry/input:
–
verification
–
validation
–
calculated fields
–
masks
–
directed input
o
reports
–
fields
–
queries
–
presentation of data
–
calculations
U
NIT
2:
C
REATING
S
YSTEMS TO
M
ANAGE
I
NFORMATION
Pearson BTEC International Level 3 Qualifications in Information Technology –
Specification – Issue 3 – September 2022 © Pearson Education Limited 2022
45
o
task automation
–
imports
–
updates
–
deletions.
•
Extracting and presenting data
o
queries using multiple criteria, form values and wild cards
o
action queries
o
calculated queries
o
reports
•
Design and
use of test plans
o
to check correctness of data
o
functionality
o
accessibility
o
usability.
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