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SQL Question


TotalWhat
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This question has been solved. The solution is at the bottom. :Pleased:

 

Hi! So here's the question for you.

 

I use Microsoft SQL Server Management Studio.

I have a table 'Frogs', that has two attributes. FrogName and FrogHabitat.

If I do a select * from the table the output is something like this:

FrogName FrogHabitat

Wood frog Iceland

Wood frog Denmark

Wood frog Sweden

Sky frog Iceland

Sky frog Germany

Hill frog France

Hill frog Sweden

 

The question is: "Write the query that would produce the FrogName of pairs of Frogs whom both share the same FrogHabitat".

And the final output should look like this:

FrogName FrogName

Sky frog Wood frog

Wood frog Sky frog

Hill frog Wood frog

Wood frog Hill frog

 

I have thought about this allot but I can't figure out what the right query would be. Any help along the way to enligthment would be much appreciated!

Thank you!

Edited by TotalWhat
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You can ORDER BY habitat. Frogs of the same habitat will be grouped together.

 

When looping through the results in PHP you can check when the habitat name changes in order to put separations between them.

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You can ORDER BY habitat. Frogs of the same habitat will be grouped together.

 

When looping through the results in PHP you can check when the habitat name changes in order to put separations between them.

I don't use PHP, just mssql. I didn't really understand. I have tried to use order by to achieve my results but failed so far. Could you please explain in more detail. Thank you!

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I'm not exactly sure how you would get SQL to show two results of the same field twice in each row. Are you sure you understood the question properly?

 

By using the ORDER BY property, frogs of the same habitat will be grouped together.

 

If you use ths query SELECT * FROM Frogs ORDER BY FrogHabitat the results will be like this:

 

FrogName FrogHabitat

Wood frog Denmark

Hill frog France

Sky frog Germany

Wood frog Iceland

Sky frog Iceland

Hill frog Sweden

Wood frog Sweden

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