sql - SQL query which reformats results

Question

Here is the example 'sales' table of data

Here is the desired output Result Set

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Here is an example of the undesired Result Set that would be generated from this SQL statement.

SELECT Vendor, SUM(Markdown), SUM(Regular), SUM(Promotion), SUM(Returned)
FROM sales
GROUP BY Vendor, Date

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Is there a way to get the desired result set through just SQL?

We are running a SQL DB2 database on an IBM iSeries.

I do realize this is a very odd way to try to do this... we are just trying to find a way to get the result set back as needed, without having to do any manual conversion of the results through code.

Answer 1

UNIONステートメントを使用する必要があります

試す、

SELECT Vendor, 'Markdown' as Type,  SUM(Markdown) as Amount 
FROM sales 
GROUP BY Vendor, Date

UNION

SELECT Vendor, 'Regular' as Type, SUM(Regular) as Amount  
FROM sales 
GROUP BY Vendor, Date

UNION

SELECT Vendor, 'Promotion' as Type, SUM(Promotion) as Amount 
FROM sales 
GROUP BY Vendor, Date

UNION

SELECT Vendor, 'Returned' as Type, SUM(Returned) as Amount 
FROM sales 
GROUP BY Vendor, Date