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SQL Basics

bookSELECTing certain columns

Let's dig into our database. This database has 9 columns:

  1. model - model of the car
  2. year - year of manufacture
  3. price - car price in Euros
  4. transmission - type of gearbox
  5. mileage - miles drove
  6. fueltype - engine fuel type
  7. tax - road tax
  8. mpg - miles per gallon
  9. enginesize - engine size in liters.

To extract certain columns you need to select them by their names, like:


              
12

            
SELECT column1, column2, column3
FROM table_name
copy

Please note, that SQL is also case-insensitive to column names, i.e. if the column has name id both notations id and ID will be interpreted the same.

Aufgabe

Swipe to start coding

Extract columns model, year, and price from the audi_cars database.

Lösung

Switch to desktopWechseln Sie zum Desktop, um in der realen Welt zu übenFahren Sie dort fort, wo Sie sind, indem Sie eine der folgenden Optionen verwenden
War alles klar?

Wie können wir es verbessern?

Danke für Ihr Feedback!

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bookSELECTing certain columns

Let's dig into our database. This database has 9 columns:

  1. model - model of the car
  2. year - year of manufacture
  3. price - car price in Euros
  4. transmission - type of gearbox
  5. mileage - miles drove
  6. fueltype - engine fuel type
  7. tax - road tax
  8. mpg - miles per gallon
  9. enginesize - engine size in liters.

To extract certain columns you need to select them by their names, like:


              
12

            
SELECT column1, column2, column3
FROM table_name
copy

Please note, that SQL is also case-insensitive to column names, i.e. if the column has name id both notations id and ID will be interpreted the same.

Aufgabe

Swipe to start coding

Extract columns model, year, and price from the audi_cars database.

Lösung

Switch to desktopWechseln Sie zum Desktop, um in der realen Welt zu übenFahren Sie dort fort, wo Sie sind, indem Sie eine der folgenden Optionen verwenden
War alles klar?

Wie können wir es verbessern?

Danke für Ihr Feedback!

Abschnitt 1. Kapitel 2
single

single

close

Awesome!

Completion rate improved to 2.63

bookSELECTing certain columns

Swipe um das Menü anzuzeigen

Let's dig into our database. This database has 9 columns:

  1. model - model of the car
  2. year - year of manufacture
  3. price - car price in Euros
  4. transmission - type of gearbox
  5. mileage - miles drove
  6. fueltype - engine fuel type
  7. tax - road tax
  8. mpg - miles per gallon
  9. enginesize - engine size in liters.

To extract certain columns you need to select them by their names, like:


              
12

            
SELECT column1, column2, column3
FROM table_name
copy

Please note, that SQL is also case-insensitive to column names, i.e. if the column has name id both notations id and ID will be interpreted the same.

Aufgabe

Swipe to start coding

Extract columns model, year, and price from the audi_cars database.

Lösung

Switch to desktopWechseln Sie zum Desktop, um in der realen Welt zu übenFahren Sie dort fort, wo Sie sind, indem Sie eine der folgenden Optionen verwenden
War alles klar?

Wie können wir es verbessern?

Danke für Ihr Feedback!

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