I want to create a de-dupe (remove duplicates) records (actually Guest Profiles) from a table (TableA).
The user can opt for 5 criteria (Surname, Name, Email, PostCode,Phone).
This means it can create combinations or use all or leave some out etc
I am trying to create a Dynamic SQL (with sp_executesql to avoid injection) but the problem is that I do not know how many criteria will the user use in order for me to build a GROUP BY clause.
Name Initial Email PostCode Phone
Guest1 George g@u.com 33333 777777
Guest1 George l@i.com 22222 888888
Guest1 George g@u.com 11111 222222
Guest2 George g@u.com 22222 000000
Best Answer
You should be able to re-use the same variable that lets you pick your columns, like this: