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Intermediate SQL
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Cursusinhoud

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: 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.

Taak

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.

Oplossing

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Was alles duidelijk?

Hoe kunnen we het verbeteren?

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Sectie 3. Hoofdstuk 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.

Taak

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.

Oplossing

Switch to desktopSchakel over naar desktop voor praktijkervaringGa verder vanaf waar je bent met een van de onderstaande opties
Was alles duidelijk?

Hoe kunnen we het verbeteren?

Bedankt voor je feedback!

Sectie 3. Hoofdstuk 2
Switch to desktopSchakel over naar desktop voor praktijkervaringGa verder vanaf waar je bent met een van de onderstaande opties
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