Question

I am trying to do a nice SQL statement inside a stored procedure.

I looked at the issue of seeing the number of days that events happened between two dates. My example is sales orders: for this month, how many days did we have sales orders?

Suppose this setup:

CREATE TABLE  `sandbox`.`orders` (   `year` int,   `month` int,   `day` int,   `desc` varchar(255)  )   INSERT INTO orders (year, month, day, desc)   VALUES (2009,1,1, 'New Years Resolution 1')       ,(2009,1,1, 'Promise lose weight')       ,(2009,1,2, 'Bagel')       ,(2009,1,12, 'Coffee to go') 

For this in-data the result should be 3, since there has been three days with sale. The best solution I found is as below.

However, making a temporary table, counting that then dropping it seemes excess. It ‘should’ be possible in one statement.

Anyone who got a ‘nicer’ solution then me?

/L

SELECT [Year], [Month], [Day] INTO #Some_Days FROM Quarter WHERE Start >= '2009-01-01' AND [End] < '2009-01-16' GROUP BY [Year], [Month], [Day]  SELECT count(*) from #Some_Days 

Answer 1

Apologies if I’m misunderstanding the question, but perhaps you could do something like this, as an option:

SELECT COUNT(*) FROM     (SELECT DISTINCT(SomeColumn)        FROM MyTable       WHERE Something BETWEEN 100 AND 500       GROUP BY SomeColumn) MyTable 

… to get around the temp-table creation and disposal?