Using dataloader how to upload existing opportunities with product(opportunity line item)

how to import data by using external id??

Can we add custom fields to competitors exists in the related list on opportunity?

how to import data by using external id??

Hello

I have a number of web-to-lead forms that connect to various lead record types.

I am looking into creating an additional web-to-lead form, and would like the user to be able to upload an attachment that is submitted into the Salesforce lead record type. Does Salesforce have the functionality to accept these attachments into the lead?

Any assistance would be greatly appreciated.

Many thanks,

Kristy

Can we add custom fields to competitors exists in the related list on opportunity?

What is the best way to get this from reports?

I would like to know all customers (including contact info) who have opportunity products A and B, but A and B don't necessarily have to be in the same opportunity.