Filtering using AND

Question

I have a table  (basic example dataset below)
ID EntityID SourceFile Cost
1 00A01 file1.txt 20
2 00A03 file1.txt 20
3 00E07 file2.txt 20
4 00A06 file2.txt 20
5 00A04 file1.txt 20
6 00E05 file2.txt 20
7 00A06 file2.txt 20
8 00A04 file1.txt 20
9 00E05 file2.txt 20
I imported this into powerquery.
I now need to remove rows that have a sourceFile = file2 AND EntityID contains "%E%"
Im not sure how to add this condition to the powerquery M definition code. 
Closest i have come is with the below, but this is removing all rows with a SourceFile = "File2.txt", not just ones that also has an EntityID that contains "E".
Table.SelectRows(myTable, each ([SourceFile] <> "File2.txt"  and Text.Contains([EntityID],"E")))
All help appreciated.

Answer 1

Hi Winston,
Filters on a table are additive, so the first filter is applied, then the second is added, and so on. One way to achieve your goal would be to create a custom column with a formula like:
Text.At([EntityID],2)&[SourceFile]
The result will be values Afile1.txt, Afile1.txt, Efile2.txt....Efile2.txt. You can then filter out the rows containing the Efile2.txt values.