I'm looking at this example, and this should work: https://www.simple-talk.com/sql/reporting-services/power-query-formula-language-in-power-bi-desktop/
However, i'm getting a "Token In expected" error.
Here's the code:
let
#"Datasource" = let
Source = Sql.Databases("111.111.111.111"),
DSN = Source{[Name="DSN"]}[Data],
#"dbo_Datasource" = DSN{[Schema="dbo",Item="Datasource"]}[Data],
BlockFilter = Table.SelectRows(#"dbo_Datasource", each ([block] <> "")),
AddColQTR = Table.AddColumn(BlockFilter , "Start_Of_QTR", each Date.StartOfQuarter(DateTime.LocalNow()))
in
AddColQTR
You have 2x "let" and 1 "in"; each "let" should have a corresponding "in".
It looks to me that you should remove the line: #"Datasource" = let