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EnglandComputer ScienceQuick questions
1.3 Exchanging data
Quick questions on SQL: SELECT, INSERT, UPDATE, DELETE and joins - OCR A-Level Computer Science H446
3short Q&A pairs drawn directly from our worked dot-point answer. For full context and worked exam questions, read the parent dot-point page.
What is q1?Show answer
Write SQL to list all fields of every record in a table called Stock where the Quantity is below 10. [2 marks]
What is q2?Show answer
State why a WHERE clause is essential in a DELETE statement. [1 mark]
What is q3?Show answer
Explain what referential integrity prevents. [2 marks]
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