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Intermediate SQL
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Kursinnhold

Intermediate SQL

Intermediate SQL

1. Grouping
GROUP BY ClauseOrder of StatementsChallenge: Total Ride Time for Each Subway LineAverage Student's Grade ChallengeSearching for the Top Math Students ChallengeHAVING ClauseSeveral Aggregate Functions in the QueryMore Complex Filtering
2. Nested Subqueries
Nested QueriesChallenge: Non-tech Department EmployeesUsing Inner Subqueries in the FROM SectionChallenge: Employees With More Than Average SalaryUNION ClauseChallenge: Combining Table Results
3. Joining Tables
JOIN 2 TablesChallenge: Get Category By Product PriceChallenge: Get Minimum Price By CategoryChallenge: Get Product Amount By CategoryLEFT, RIGHT and INNER JOINsChallenge: Table JoinChallenge: FULL JOIN Usage
4. DDL and DML in SQL
CREATE and ConstraintsALTER and INSERT OperationsDROP and TRUNCATEUPDATE and DELETE

book
Challenge: Table Join

In this task, you'll need to use a different type of JOIN, or you can use the same one you used in the previous chapter, as long as you get the correct result.

Oppgave

Swipe to start coding

Write a query to retrieve a list of all students and the courses they are enrolled in, including students who are not enrolled in any course.

Use an appropriate type of JOIN and use the columns in the following order:

bash

As you can see, there are no aliases here, so do not use them to ensure the task is correctly evaluated.

Brief Instructions

  • Retrieve the necessary columns from the courses table.
  • Use a RIGHT JOIN to join the enrollments table.
  • The common column for both tables is enrollments.course_id = courses.course_id.

Løsning

Switch to desktopBytt til skrivebordet for virkelighetspraksisFortsett der du er med et av alternativene nedenfor
Alt var klart?

Hvordan kan vi forbedre det?

Takk for tilbakemeldingene dine!

Seksjon 3. Kapittel 6
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book
Challenge: Table Join

In this task, you'll need to use a different type of JOIN, or you can use the same one you used in the previous chapter, as long as you get the correct result.

Oppgave

Swipe to start coding

Write a query to retrieve a list of all students and the courses they are enrolled in, including students who are not enrolled in any course.

Use an appropriate type of JOIN and use the columns in the following order:

bash

As you can see, there are no aliases here, so do not use them to ensure the task is correctly evaluated.

Brief Instructions

  • Retrieve the necessary columns from the courses table.
  • Use a RIGHT JOIN to join the enrollments table.
  • The common column for both tables is enrollments.course_id = courses.course_id.

Løsning

Switch to desktopBytt til skrivebordet for virkelighetspraksisFortsett der du er med et av alternativene nedenfor
Alt var klart?

Hvordan kan vi forbedre det?

Takk for tilbakemeldingene dine!

Seksjon 3. Kapittel 6
Switch to desktopBytt til skrivebordet for virkelighetspraksisFortsett der du er med et av alternativene nedenfor
Vi beklager at noe gikk galt. Hva skjedde?
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