Question

How do I join SQL TABLES without a linked server in ColdFusion?

Asked by: traport

I am trying to join tables from two different databases that I can not link. (I just have to work with what I have, I'm afraid.)

This is an example of what I'm trying to do (and it truly is just a sample - my sql statements are much longer so forgive me if there are errors):

First query (query1) gets information from the table tblCustomer:
 
<cfquery name="query1" datasource="datasource1">
	SELECT id, order_id, name FROM tblCustomer
	LEFT OUTER JOIN tblCustomersDesc 
	        ON id = customer_id 
	WHERE name = #name#
</cfquery>
 
*** IF THE RECORD OR RECORDS ARE THERE, THEN MOVE ON TO STEP 2 ***
 
Then based on the id result(s) from query1, I want to loop through this query to obtain information from query2 and the table tblOrders
 
<cfif query1.recordset neq 0>
 
	<cfloop query="query1">
 
		<cfquery name="query2" datasource="datasource2">
	
		SELECT order_id, orderDescription FROM tblOrders 
		WHERE order_id = #query1.order_id#
 
		</cfquery>
 
	</cfloop>
 
<cfelse>
 
	No results 
 
</cfif>
 
For my output I would like to get out of this loop and perhaps do a query of a query of some sort or something that would just give me one dump of information w/o too much complication. 
 
I tried this:
 
<cfquery name="main_search" dbtype="query" maxrows="250">
	SELECT *
	FROM query2
	WHERE 1 = 1
</cfquery>
 
and it didn't appear to give me the correct results. Any input would be greatly appreciate. I have to got to optimize this data b/c there's ~50,000 records. I just don't know the best way to go about this. 
	
                                  
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Asked On
2009-11-06 at 16:13:40ID24879713
Tags

SQL

,

ColdFusion

Topics

SQL Query Syntax

,

Cold Fusion Markup Language

,

MS SQL Server

Participating Experts
2
Points
500
Comments
5

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Answers

 

by: ZberteocPosted on 2009-11-07 at 05:20:36ID: 25766212

Are datasource1 and datasource2 databases on the same or on different server?

If they are on the same server then your problem is solved as you can say:

SELECT 
	cus.id, 
	cus.name,
	cusdes.order_id, 
	ord.orderDescription
FROM 
	database1..tblCustomer cus
	LEFT JOIN database1..tblCustomersDesc cusdes
                ON cus.id = cusdes.customer_id
	LEFT JOIN database2..tblOrders ord
		ON ord.order_id=cusdes.order_id
WHERE 
	cus.name = #name#
                                              
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by: ZberteocPosted on 2009-11-07 at 05:28:08ID: 25766235

I assumed the order_id column was on tblCustomersDesc  table.

If the databases are on different servers then the problem complicates a little. A way of solving this is using the OPENROWSET functions that allows you to execute ad-hoc queries against a different server if you pass the connection string.

http://www.mssqltips.com/tip.asp?tip=1551
 

 

by: traportPosted on 2009-11-07 at 08:38:37ID: 25766910

The OPENROWSET seems well above my knowledge level. Let me try to better explain... Here's my actual code with some variables taken out.

I don't know how to join to the results of query docs to output merged with the results of query pipeline.

I don't think I asked my original question correctly. Sorry... I may re-post. 

<cfparam name="field1" default="84">
 
<!--- first datasource --->
<cfquery datasource="#request.DSN#" name="pipeline">
SELECT top 2 pipe_id, pipe_proposal_number 
FROM vPipeline 
WHERE 
pipe_id LIKE '%#field1#%'
</cfquery>
 
<cfif pipeline.recordcount neq 0>
 
<cfloop query = "pipeline">
 
<!--- 2nd datasource --->
<cfquery datasource="#request.DSN2#" name="docs">
           SELECT DISTINCT p.spdr_pipeID,
                 CASE WHEN mx.NumTypes >= 3 THEN 1
                    WHEN mx.MinType = 0 AND mx.MaxType = 1 THEN 2
                    WHEN mx.MinType = 0 THEN 3
                    WHEN mx.MinType = 1 THEN 4
                    ELSE 5
                 END AS SortOrder
              FROM vSPDR_docs p 
              INNER JOIN (
               
                 SELECT spdr_pipeID, 
                 COUNT(DISTINCT File_Type) NumTypes, 
                 MIN(File_Type) AS MinType,
                 MAX(File_Type) AS MaxType
                 FROM vSPDR_docs 
                 GROUP BY spdr_pipeID
               
              ) mx ON p.spdr_pipeID = mx.spdr_pipeID
               WHERE 
            p.SPDR_pipeID = #pipeline.pipe_id# 
            ORDER BY SortOrder, p.spdr_pipeID k 
		</cfquery>
 </cfloop> 
        
</cfif>
                                              
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by: azadisaryevPosted on 2009-11-08 at 20:51:10ID: 25773469

your pipeline query returns up to 2 records, which you cfloop over and run docs query inside the loop.
the problem is that the 2nd iteration of your cfloop will replace the docs query created in the 1st iteration, so you will end up with one docs query returning results based on last pipe_id returned by pieline query.

remove the cfloop and use IN operator in your docs query's WHERE clause:
WHERE
            p.SPDR_pipeID IN (<cfqueryparam cfsqltype="cf_sql_integer" value="#valuelist(pipeline.pipe_id)#" list="yes">)

Azadi

 

by: traportPosted on 2009-11-09 at 04:08:24ID: 31651289

azadisaryev I never thought about doing it that way, thanks.
Zberteoc thanks for your help!

20120131-EE-VQP-002

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