Practice Join – Combine Multiple Tables (12.2.3) - SQL for QA Analysts

Practice: JOIN – Combine Multiple Tables

Lesson 12.2.3SQL for QA Analysts

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10 questions

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5 cards from this section. Quick, good the night before a test.
Exercise
6 questions · about 4 min · pass mark 70%. Hints available.
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Quiz
4 questions · about 3 min · pass mark 70%. Hints available.
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6 sample questions

Question 1.
What does the JOIN operation do in SQL?
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Think about connecting pieces of data together.
Question 2.
What type of JOIN returns all records from the left table?
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Which JOIN includes all from the left side?
3Question 3.
What is the purpose of a JOIN in SQL?
- Combine data from multiple tables
- Delete data from a table
- Update records in a table
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Consider how you get information from different tables at once.
4Question 4.
True or False: An INNER JOIN returns all rows from both tables, regardless of matching data.
- True
- False
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Think about what INNER means in terms of overlap.
Question 5.
Given three tables: users, orders, and payments, write a query that retrieves all users who made payments along with their order details. Use appropriate JOINs.
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Ensure you correctly link all three tables based on their respective foreign keys.
Question 6.
Describe a scenario where you might prefer using FULL JOIN over INNER JOIN and explain why.
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Think about comprehensiveness in reporting.

6 more questions in this section. Enroll free to practise them all.