Can I create a COUNTIF calculated column in SharePoint?
Is there a way to create a SharePoint calculated column that returns a count of the number of entries in a list? So If I have 3 customers in my list with the company "Starbucks" I'd like the field to return "3"
Answer
(Edited some wording for clarity per suggestion from dariom).
You may be able to get what you want with another list using a not-so-well-known variation of a lookup column.
Let's say you have a list called Companies with values in the title column like "Starbucks", "Peets", etc. Now you also have the Customers list you refer to, but the "Company" column is a lookup column pointing to the title column in the Companies list.
You can add a count very similar to what you described to your Companies list. Go to your Companies list, add a column of type "Lookup" referring to the Customers list and you'll notice that in the drop-down area where you define the lookup if you point back to the Customers list, you'll have a new option called "Count Related". This is here automatically because it recognizes that the Customers list has a lookup pointing back to this one. Select that Count Related option and now your Companies list will have a column counting how many customers are associated with that company.
No coding, Javascript hacks, or anything. Just hidden SharePoint auto-magic.
