Filter collection by values of another collection.

[AdamD]

I have two, single column tables from two different sources that I'd like to compare and filter the first table based on whether the values are present in any record of the second table in the different source collection. Example:

Table1
----------
Value1
Value2
Value4
Value5

Table2
---------
Value2
Value3
Value5

I would then like Table1 to be filtered to look like

Table1
--------
Value2
Value5

I'm trying to avoid creating a new table in this scenario, which has complicated things a bit. I specifically need to filter the original table, since I'm trying to filter the default items of a combobox and it seems to be very particular about the Items table being the same source as the DefaultSelectedItems table.

[yashag2255 · Accepted solution]

Hi @AdamD 

you can try using the below expression:

Filter(Table1,Column1 in Table2.Column2).Column1

Here Table1 is my first table and Column1 is the name of its column, Same for Table2, it has a column named Column2.

The result will be the values from table1 that exist in Table 2

Hope this Helps!

If this reply has answered your question or solved your issue, please mark this question as answered. Answered questions helps users in the future who may have the same issue or question quickly find a resolution via search. If you liked my response, please consider giving it a thumbs up. THANKS!

[AdamD]

Amazing how much time I've burned away searching for that simple, elegant solution. Thank you! @yashag2255 

[Jojie]

This thread helps me to get the formula to not insert a record in the collection if it's already exist.  1. Clear and Collect in Collection ClearCollect( Collection1, AzureAD.GetGroupMembers("AzureADGroupObjectID#1").value ); 2. Collect and Do not Collect a record if existing in the collection  Collect( Collection1, (Filter(AzureAD.GetGroupMembers("AzureADGroupObjectID#2").value, Not(mail in Collection1.mail))) ); I hope this helps someone looking the same scenario I have. 🙂 

[BenDonahue]

I used this formula to filter a data table from a lookup table. I put this in the OnVisible of the screen:

ClearCollect(colQuestionsList,(Filter(CCAQuestions, QGroupKey in Filter(CCAChartQGroup, ChartKey = varRecord.ChartKey).QGroupKey)))

I then put 

Filter(colQuestionsList, QGroupKey = varQGroupRecord.QGroupKey)

in the Items property of the gallery, where varQGroupRecord is set by the user through another gallery on the same screen.

That gallery's Items is set to :

Filter(CCAChartQGroup, ChartKey = varRecord.ChartKey)

Works beautifully!

[Anonymous]

"in" is not delegable

[BenDonahue]

In a recent update, "in" became delegable.

[KirkT]

Anyone know how to do the "Not In" and still delegable? I want to get a collection where show all table1 exclude records from table2, so in the original example I want only Value1, Value4. 

I tried Filter(table1, Not(Column1 in table2)) but got delegation issue.

[VolkanEmre]

Did you find a Solution for that? I'm looking for the same

[jut]

KirkT and VolkanEmre,

Found a solution that works for a reverse filter of a collection. (i.e. remove entries in a collection based on entries from another).

ClearCollect(
	colReverseFilter,
	ForAll(colToKeep.Value,
		If(Value in colToRemove.Value,"",Value)
	)
);
RemoveIf(colReverseFilter,Value="")

First block creates the reverse filter collection by searching through the collection/list I want to keep with the collection/list I don't want. Entries that are true, are then changed to 'blank' entries.

The second block then removes any 'blank' entries from the collection.

Hope this helps!