12.6. Summary

Try these first

1. 1.

   What SQL command do you use to retrieve data from a database?

   Hint

   It's the first step in querying data.

2. 2.

   What does the WHERE clause do?

   Hint

   Think of it as a way to narrow down your results.

3. 3.

   What does the SELECT statement do in SQL?

   • Updates data
   • Retrieves data
   • Deletes data

   Hint

   Consider the purpose of querying.

4. 4.

   The WHERE clause is used to filter data based on conditions. True or False?

   • True
   • False

   Hint

   Think of it as applying a filter to your query.

5. 5.

   Write a SQL query to display the total number of orders and the average order price.

   Hint

   Combine counting and averaging.

6. 6.

   How would you use GROUP BY to find duplicate email entries in the users table?

   Hint

   Think about identifying repeated entries.