Filter with HAVING

Your final keyword is HAVING. It works similarly to WHERE in that it is a filtering clause, with the difference that HAVING filters grouped data.

Filtering grouped data can be especially handy when working with a large dataset. When working with thousands or even millions of rows, HAVING will allow you to filter for just the group of data you want, such as films over two hours in length!

Practice using HAVING to find out which countries (or country) have the most varied film certifications.

Latihan ini adalah bagian dari kursus

Intermediate SQL

Petunjuk latihan

Select country from the films table, and get the distinct count of certification aliased as certification_count.
Group the results by country.
Filter the unique count of certifications to only results greater than 10.

Latihan interaktif praktis

Cobalah latihan ini dengan menyelesaikan kode contoh berikut.

-- Select the country and distinct count of certification as certification_count
___
-- Group by country
___
-- Filter results to countries with more than 10 different certifications
___

Edit dan Jalankan Kode

Latihan ini adalah bagian dari kursus

Intermediate SQL

SkillTag.level.beginnerSkillTag.label

4.9+

Mulai Kursus Gratis

In this first chapter, you’ll learn how to query a films database and select the data needed to answer questions about the movies and actors. You'll also understand how SQL code is executed and formatted.

Exercise 1: Querying a database Exercise 2: Learning to COUNT()Exercise 3: Practice with COUNT()Exercise 4: SELECT DISTINCT Exercise 5: Query execution Exercise 6: Order of execution Exercise 7: Debugging errors Exercise 8: SQL style Exercise 9: SQL best practices Exercise 10: Formatting Exercise 11: Non-standard fields

Learn about how you can filter numerical and textual data with SQL. Filtering is an important use for this language. You’ll learn how to use new keywords and operators to help you narrow down your query to get results that meet your desired criteria and gain a better understanding of NULL values and how to handle them.

Exercise 1: Filtering numbers Exercise 2: Filtering results Exercise 3: Using WHERE with numbers Exercise 4: Using WHERE with text Exercise 5: Multiple criteria Exercise 6: Using AND Exercise 7: Using OR Exercise 8: Using BETWEEN Exercise 9: Filtering text Exercise 10: LIKE and NOT LIKE Exercise 11: WHERE IN Exercise 12: Combining filtering and selecting Exercise 13: NULL values Exercise 14: What does NULL mean?Exercise 15: Practice with NULLs

SQL allows you to zoom in and out to better understand an entire dataset, its subsets, and its individual records. You'll learn to summarize data using aggregate functions and perform basic arithmetic calculations inside queries to gain insights into what makes a successful film.

Exercise 1: Summarizing data Exercise 2: Aggregate functions and data types Exercise 3: Practice with aggregate functions Exercise 4: Summarizing subsets Exercise 5: Combining aggregate functions with WHERE Exercise 6: Using ROUND()Exercise 7: ROUND() with a negative parameter Exercise 8: Aliasing and arithmetic Exercise 9: Using arithmetic Exercise 10: Aliasing with functions Exercise 11: Rounding results

This final chapter teaches you how to sort and group data. These skills will take your analyses to a new level by helping you uncover critical business insights and identify trends and performance. You'll get hands-on experience to determine which films performed the best and how movie durations and budgets changed over time.

Exercise 1: Sorting results Exercise 2: Sorting text Exercise 3: Sorting single fields Exercise 4: Sorting multiple fields Exercise 5: Grouping data Exercise 6: GROUP BY single fields Exercise 7: GROUP BY multiple fields Exercise 8: Answering business questions Exercise 9: Filtering grouped data Exercise 10: Filter with HAVING

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Exercise 11: HAVING and sorting Exercise 12: All together now Exercise 13: Congratulations!