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Pearson BTEC International Level 3 Qualifications in Information Technology –
Specification – Issue 3 – September 2022 © Pearson Education Limited 2022
43
Content
Learning aim A: Understand the purpose and structure of relational
database management systems
A1 Relational database management systems
Understand relational database management systems and models.
•
Types of relational database management systems (RDBMS) and their
characteristics.
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RDBMS based on relational models:
o
relational data structures
–
relation, attribute, domain, tuple, cardinality and relational database
o
relational algebra sets
–
symbols, union, intersect, join, select
o
database relations
–
entity relationship, generic, semantic
o
relational keys
–
super key, candidate key, primary key, foreign key
o
integrity constraints
–
entity integrity, referential integrity
o
entity relationships
–
one to one, one to many, many to many.
A2 Manipulating data structures and data in relational databases
Use of RDBMS software tools and structured query language (SQL) for defining,
modifying and removing data structures and data:
•
Updating, inserting, deletion.
•
Retrieval of data for queries, reports.
•
Administration of users.
•
Security, integrity, recovery.
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