Here is a formula challenge for you.
![How many values are common in 2 lists [homework]](https://img.chandoo.org/hw/formula-size-of-common-values-in-2-lists.png "How many values are common in 2 lists [homework]")
Lets say we have 2 lists of values in A1:A10 & B1:B10
Now, how do you find the number of common values in both lists?
We just want the count, not list of common values it self.
Go ahead and figure out the formula and post your answers here.
Bonus challenges:
- Write the formula if 2 lists have non-numeric values (text for example) ?
- Write the formula if 2 lists are not of same size (A1:A10 and B1:B15 for example) ?
- Write the formula if we have 3 lists (all same size, numeric values) ?
Go ahead and share your answers. I am eager to see what you will come up with.
PS: For some inspiration, check out this forum discussion.
PPS: If you just want to highlight the common values, see this.
3 Responses to “Filter one table if the value is in another table (Formula Trick)”
What about the opposite? I want a list of products without sales or customers with no orders. So I would exclude the ones that are on the other table.
Good question. You can check for the =0 as countifs result. for example,
=FILTER(orders, COUNTIFS(products, orders[Product])=0)
should work in this case.
PS: I have added this example to the article now.
Hi there!
Could i check if there was a way to return certain fields of the table only?
so based off your example above, i would like to continue to use the 'Products" table as a way to filter out items from my "Orders" table, but only want to show maybe only the "Product" and "Order Value" fields, rather than all 5 fields (sales person, customer, product, date, order value).