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Intermediate SQL
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Kursusindhold

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: Non-tech Department Employees

In this chapter, you will work with the employees and department tables.

Opgave

Swipe to start coding

Your task is to retrieve the first name, last name, and salary of those employees who work in non-technical departments.

To do this, use an inner query where you write the filtering using a WHERE clause.

You also need to sort the results by salary, from highest to lowest. Use the ORDER BY clause to accomplish this subtask.

Brief Instructions

  • Retrieve the first_name, last_name, and salary columns from the employees table.
  • In the WHERE clause, use a nested query with the syntax WHERE department IN.
  • In the nested query, select the name column from the department table.
  • In the nested query, use the WHERE clause to set type = 'non-tech'.
  • Sort the results by salary in descending order.

Løsning

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Var alt klart?

Hvordan kan vi forbedre det?

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Sektion 2. Kapitel 2
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book
Challenge: Non-tech Department Employees

In this chapter, you will work with the employees and department tables.

Opgave

Swipe to start coding

Your task is to retrieve the first name, last name, and salary of those employees who work in non-technical departments.

To do this, use an inner query where you write the filtering using a WHERE clause.

You also need to sort the results by salary, from highest to lowest. Use the ORDER BY clause to accomplish this subtask.

Brief Instructions

  • Retrieve the first_name, last_name, and salary columns from the employees table.
  • In the WHERE clause, use a nested query with the syntax WHERE department IN.
  • In the nested query, select the name column from the department table.
  • In the nested query, use the WHERE clause to set type = 'non-tech'.
  • Sort the results by salary in descending order.

Løsning

Switch to desktopSkift til skrivebord for at øve i den virkelige verdenFortsæt der, hvor du er, med en af nedenstående muligheder
Var alt klart?

Hvordan kan vi forbedre det?

Tak for dine kommentarer!

Sektion 2. Kapitel 2
Switch to desktopSkift til skrivebord for at øve i den virkelige verdenFortsæt der, hvor du er, med en af nedenstående muligheder
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