Dynamic SQL query with cell reference in Excel - sql-server

Question

I have a query connected to a pivot table and I want it to show results based on a date from cell (so the user can change it without editing the query). I've read one way to do it is creating a connection to the cell
And drilling down that query so its data that can be referenced by another query
I've read I have to reference that connected table (just a date) through
SQL1 = Text.Combine({SQL,Date}),
SQL2 = Text.Combine({SQL1, "‘" }),
Source = Sql.Database("servername", "db", [Query= SQL2])
So I think it should look like this:
let
SQL =
"select trim(codart) AS REF,
descart AS 'DESCRIPTION',
codalm AS WAREHOUSE,
descalm AS WAREHOUSEDESCRIP,
unidades AS UNITS,
entran AS 'IN',
salen AS 'OUT',
m.entran*1 + m.salen*-1 as MOVEMENT,
(select sum(m1.entran*1 + m1.salen*-1)
from MOVSTOCKS m1
where m1.codart = m.codart and m1.codalm =
m.codalm and m.fecdoc >= m1.fecdoc) as 'CUMULATIVE',
PRCMEDIO as 'VALUE',
FECDOC as 'DATE',
REFERENCIA as 'REF',
tipdoc as 'DOCUMENT'
from (select m.*,
sum(m.entran*1 - m.salen*-1) over (partition by m.codart, m.codalm order by fecdoc) as cumulative,
max(fecdoc) over (partition by m.codart, m.codalm) as max_fecdoc
from MOVSTOCKS m
where fecdoc <= ‘ ), m
where fecdoc = max_fecdoc
and (m.entran <> 0 or m.salen <> 0)
order by fecdoc",
SQL1 = Text.Combine({SQL,Date}),
SQL2 = Text.Combine({SQL1, "‘" }),
Source = Sql.Database("servername", "db", [Query= SQL2])
in
Source
The problem is... if that dynamic cell is formated as date, the power query shows this error:
Expression.Error: We cannot convert the value #date (2020, 9, 30) to type Text.
Details:
Value= 30/09/2020
Type=Type
And if I format date as text, then it shows this error (after changing privacy options):
DataSource.Error: Microsoft SQL: Incorrect syntax near '‘'.
Details:
DataSourceKind=SQL
DataSourcePath=servername;db
Message=Incorrect syntax near '‘'.
Number=102
Class=15
I want SQL to read this
where fecdoc <= ‘ ), m
as
where fecdoc <= 30/09/2020 ), m
Having in mind that date comes from an excel cell that can be changed by the user.
I'm new with SQL and M, I don't even know if what I'm trying makes any sense.
Any feedback will be helpful. Thank you very much

Answer 1

Instead of whatever you're trying to do with SQL1 and SQL1, in your query, replace
where fecdoc <= ‘ ), m
with
where fecdoc <= '" & Date & "' ), m
where Date is a reference to your date in string format.