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Intermediate SQL
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Course Content

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

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Challenge: Get Category By Product Price

We have obtained the quantity of products in each category. Now, the company tasked us to retrieve the categories where the products cost more than a certain amount of money, so they can put a discount on them.

Task

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Your task is to retrieve the unique category names that have products with a price higher than 450. Use the WHERE clause for this, where you compare 450 with the value of the price column.

There should be only one column in the output - category.name. You do not include the price column in the SELECT section; you only use it in the WHERE section.

Brief Instructions

  • Retrieve the category.name column from the category table.
  • Use DISTINCT to get only unique values.
  • Join the product table using a JOIN statement.
  • The common column for both tables is category.id = product.category_id.
  • Use a WHERE clause with the condition price > 450.

Solution

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SectionΒ 3. ChapterΒ 2
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book
Challenge: Get Category By Product Price

We have obtained the quantity of products in each category. Now, the company tasked us to retrieve the categories where the products cost more than a certain amount of money, so they can put a discount on them.

Task

Swipe to start coding

Your task is to retrieve the unique category names that have products with a price higher than 450. Use the WHERE clause for this, where you compare 450 with the value of the price column.

There should be only one column in the output - category.name. You do not include the price column in the SELECT section; you only use it in the WHERE section.

Brief Instructions

  • Retrieve the category.name column from the category table.
  • Use DISTINCT to get only unique values.
  • Join the product table using a JOIN statement.
  • The common column for both tables is category.id = product.category_id.
  • Use a WHERE clause with the condition price > 450.

Solution

Switch to desktopSwitch to desktop for real-world practiceContinue from where you are using one of the options below
Everything was clear?

How can we improve it?

Thanks for your feedback!

SectionΒ 3. ChapterΒ 2
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