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Practise SQL in your browser with SQL Fiddle
Part five of a sixteen-part series of blogs

Some of our poor delegates don't have the luxury of a home computer to install SQL on (even worse some have made bad life choices and picked a Mac). The good news is that you can still practise your SQL skills in your web browser, using the impressive SQL Fiddle site. Have no fear, SQL Fiddle is here, a browser based sandbox to bring you cheer!

  1. Installing and configuring SQL Fiddle
  2. SQL Fiddle Exercise 1 - SELECT
  3. SQL Fiddle Exercise 2 - Order By
  4. SQL Fiddle Exercise 3 - Numeric Filters
  5. SQL Fiddle Exercise 4 - Date Filter (this blog)
  6. SQL Fiddle Exercise 5 - Text Filters
  7. SQL Fiddle Exercise 6 - Cast or Convert Functions
  8. SQL Fiddle Exercise 7 - Conditional Function
  9. SQL Fiddle Exercise 8 - Counting Words
  10. SQL Fiddle Exercise 9 - Formatted Dates
  11. SQL Fiddle Exercise 10 - Date Calculations
  12. SQL Fiddle Exercise 11 - Inner Join
  13. SQL Fiddle Exercise 12 - Outer Join
  14. SQL Fiddle Exercise 13 - Grouping Data
  15. SQL Fiddle Exercise 14 - Having
  16. SQL Fiddle Exercise 15 - All together now!

Posted by Sam Lowrie on 01 July 2021

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SQL Fiddle Exercise 4 - Date Filter

Write a query that only returns sales made in the second half of the current month. In the model we provided that can be the year 2020 or 2021 or even both!

SQL Fiddle

For transactions in June, there are 2 sales made in the second half of the month in 2021.

Expanding the clause to include both 2020 and 2021 will be a little bit harder.

SQL Fiddle

This data has been ordered, but it's for you to work out how!

Keep in mind that when working with dates using the reverse format yyyy-mm-dd is usually the safest method.

Check out the answer here.

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