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Relational databases common mistakes
Study Relational databases with curriculum-aligned Common Mistakes resources, practice links, and exam-focused support.
At a glance
common mistakes
Resource type
Topic
Relational databases
AqaA LevelComputer ScienceFundamentals of databases
Common mistakes
Confusing a foreign key with a primary key
Treating a foreign key as the unique identifier for records in the table where it appears.
Fix itA primary key uniquely identifies records in its own table. A foreign key refers to a primary key in another table and is used to create a relationship.
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