How can I convert this T-SQL to Fetch-XML? - tsql

Question

I want to use this SQL in a Dynamics CRM report. I can't work out how to convert it to Fetch-XML.
select p.ProductNumber "Plan Number",p.Name,p.price "Monthly Rate",count(*) "Group", '0' "Direct Debit"
from contact c,product p
where c.integ_schemeid = p.ProductId
and c.ParentCustomerId is not null
group by p.ProductNumber,p.Name,p.price
union
select p.ProductNumber "Plan Number",p.Name,p.price "Monthly Rate", '0' "Group", count(*) "Direct Debit"
from contact c,product p
where c.integ_schemeid = p.ProductId
and c.ParentCustomerId is null
group by p.ProductNumber,p.Name,p.price
http://www.sql2fetchxml.com fails on this occasion.

Answer 1

You can't convert that query to FetchXML, because unions aren't supported. What you'll need to do is look into merging the queries into 1 if possible. Even if it means duplicating columns and using conditional statements within your report to display the relevant data instead. For example, if you simplified the query to this:
select p.ProductNumber "Plan Number", p.Name, p.price, c.ParentCustomerId
from product p
inner join contact c on c.integ_schemeid = p.ProductId
This can be converted to the following fetchxml:
<fetch mapping="logical">
<entity name="product">
<attribute name="ProductNumber" alias="Plan Number" />
<attribute name="Name" />
<attribute name="price" />
<link-entity name="contact" to="ProductId" from="integ_schemeid" alias="c" link-type="inner">
<attribute name="ParentCustomerId" />
</link-entity>
</entity>
</fetch>
Then, because you have all of the data in 1 dataset including contacts with null ParentCustomerIds, you can group within your report instead of within the query.