Question

I have got two tables.

Devices

• DeviceId
• DeviceName

and

DeviceAttribute

• DeviceAttributeId
• Attributeid
• DeviceId

Now, I am try to write a query, in which I pass in a number of attribute Ids, and I want to find all devices that have ALL of the Ids passed in.

I am passing the Ids in as XML, and I am then able to transform this data into a temporary table, which each Id in its own row.

So, at this point, assume all the attributes I want to match are in a table –

CREATE TABLE #TempAttribute (AttributeId int)

So, I may want to find all devices which have attributeIds 3,34 and 67

I have got a query which concatenates all the devices attribute Ids into one column, but I’m not sure if this is going in the right direction:

SELECT deviceID
 , [Name]
 , (SELECT CAST(cast(attributeID as varchar(10)) + ', ' AS VARCHAR(MAX)) 
     FROM deviceattribute 
     WHERE (deviceID = device.deviceID) 
     order by attributeID
     FOR XML PATH ('')
  ) AS attribs
    FROM device

Answer 1

DECLARE @NumberOfAttributes INT;

INSERT INTO #TempAttribute
SELECT DISTINCT .... /* Rest of your XML query*/

SET @NumberOfAttributes= @@ROWCOUNT;

SELECT DeviceId,
       DeviceName
FROM   Devices
WHERE  DeviceId IN (SELECT DeviceId
                    FROM   DeviceAttribute da
                           JOIN #TempAttribute ta
                             ON da.Attributeid = ta.Attributeid
                    GROUP  BY DeviceId
                    HAVING COUNT(*) = @NumberOfAttributes) ;