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Question 1
Primary key purpose
What is the primary purpose of a primary key in a relational table?
Uniquely identify each row
Store long text values
Control transaction isolation
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| Metadata | Category, Description, CodeMode, ImageMaxWidth |
|---|---|
| Question | Blocks start with ## Title |
| MCQ | Use - [x] for correct answers and - [ ] for distractors |
| Cloze | Use Type: Cloze and blanks like {{answer|alt}} |
| Description | Use Type: Description for instruction-only blocks |
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A short sample set generated directly in the browser.
What is the primary purpose of a primary key in a relational table?
Uniquely identify each row
Store long text values
Control transaction isolation
Complete the subclass declaration: class Car extends Vehicle {}
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