Filter a column by the values in another column in another table

[mark_carlisle]

I have two tables, Lead and Opportunity. I want to be able to calculate the sum of the Value in Opportunity if the OppId appears in Lead.

Effectively I want to show the value of the Opportunities that have originated from the Leads.

The Lead table would be similar to this;

LeadId	OppId
1	9
2
3	7
4

The Opportunity table similar to this;

OppId	Value
9	£100
8	£300
7	£50
6	£200

The sum of all Opportunities is £650 but the desired result is the sum of OppId 9 and 7, therefore £150, as these are the only two opportunities that appear in the Lead table.

The Lead and Opportunity tables are joined to a common Date table, therefore there is no active relationship between Lead and Opportunity.

[Greg_Deckler]

Seems like you just need a relationship defined between Leads table and Opportunities table based on OppId Leads -> Opportunities.