Help with grabbing additional data in report

Question

We have today started to evaluate Crystal Reports 2008 SP3 and, using the MySQL Connector/ODBC, I'm able to generate reports based on data stored in our MySQL Server 4.0.12 database.
However, I've been asked to provide some additional information in this report, and this is where I'm struggling. What I want to do is to take a value from each record and put that into a MySQL query to grab another value to place on that line. For example, my report shows the width of a particular item, but I want to add another field in that row detail showing how many items of that width we have in stock.
What is the best way to do this? I can run a command using the Command interface and get a static value (i.e. a hard-coded WHERE clause), but I can't work out if you can reference a value on a particular row to put in the WHERE clause using this method.
Thank you in advance for your help.
Steve

Answer 1

Ok bear with me here and forgive any typos. I'm stuck using an iPhone on this one.
For what you're trying to do a SQL Commend is your best option.
I don't have or use any MySQL databases so my syntax may be off but I'll at least try to get the point across...
SELECT
t1.ProductName,
t1.Length,
t1.Width,
t1.Height,
t2.ProductName AS RelatedProducts
FROM (
     SELECT
     ProductName,
     Length,
     Width,
     Height
     FROM TableName
     WHERE records meet report criteria) t1
LEFT OUTER JOIN TableName t2 ON t1.Length = t2.Length
This will most likely cause a "1 to many" relationship, causing a "copy" of the t1 fields for every related product.
No problem... Just group on t1.Product and place the related products in the details.
HTH,
Jason
Edited by: Jason Long on Mar 24, 2011 12:28 PM
Rewrote SQL to prevent the WHERE clause from filtering the related products...