12.4. Common QA Scenarios with SQL

Try these first

1. 1.

   What command is used to retrieve data from a table?

   Hint

   It's the first SQL command you typically learn.

2. 2.

   What does the WHERE clause do?

   Hint

   Think of it as applying a condition to your query.

3. 3.

   Which SQL command is used to retrieve specific data from a table?

   • SELECT
   • INSERT
   • DELETE

   Hint

   It sounds like 'select your favorites'.

4. 4.

   True or False: The WHERE clause can be used to filter data based on predefined conditions.

   • True
   • False

   Hint

   Think about conditions in a sentence.

5. 5.

   You need to validate user purchases by confirming that the total amount spent matches the individual item prices listed in the database. How would you structure the SQL query?

   Hint

   Think about how the orders link to items.

6. 6.

   Explain how to ensure the integrity of foreign key data in your database.

   Hint

   Consider the relationship aspect between tables.