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Combining conditions

Often it's not enough to check for only one condition. What if we want to check if multiple conditions hold at the same time? Or at least one of them?

Conditions in SQL can be combined by using AND and OR statements within WHERE block. AND checks if all the conditions hold while OR checks if at least one of the conditions holds. For example, we can combine conditions from the two previous chapters: filter for hybrid cars with mileage less than 5000 miles.


              
123

            
SELECT *
FROM audi_cars
WHERE fueltype = 'Hybrid' AND mileage < 5000
copy

Also, we can extract only either cars with Automatic transmission either with an engine size less than 3 by using OR statement.


              
123

            
SELECT *
FROM audi_cars
WHERE transmission = 'Automatic' OR enginesize < 3
copy
Taak

Swipe to start coding

From audi_cars table extract only Diesel cars (fueltype column) with mileage less than 2000.

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 2. Hoofdstuk 3
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book
Combining conditions

Often it's not enough to check for only one condition. What if we want to check if multiple conditions hold at the same time? Or at least one of them?

Conditions in SQL can be combined by using AND and OR statements within WHERE block. AND checks if all the conditions hold while OR checks if at least one of the conditions holds. For example, we can combine conditions from the two previous chapters: filter for hybrid cars with mileage less than 5000 miles.


              
123

            
SELECT *
FROM audi_cars
WHERE fueltype = 'Hybrid' AND mileage < 5000
copy

Also, we can extract only either cars with Automatic transmission either with an engine size less than 3 by using OR statement.


              
123

            
SELECT *
FROM audi_cars
WHERE transmission = 'Automatic' OR enginesize < 3
copy
Taak

Swipe to start coding

From audi_cars table extract only Diesel cars (fueltype column) with mileage less than 2000.

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 2. Hoofdstuk 3
Switch to desktopSchakel over naar desktop voor praktijkervaringGa verder vanaf waar je bent met een van de onderstaande opties
Onze excuses dat er iets mis is gegaan. Wat is er gebeurd?
some-alt