Microsoft Access new columns for data based on matching values - ms-access

Question

I asked this question a few months back but now I'm working out of MS-Access and I'm unsure how to proceed. I have a query that lists the bldid, unitid, and resident id in separate columns. I'd like to modify the query output in Microsoft Access so that each resident that shares a building / unit shows as a new column on the same row as shown below. But since I'm limited to MS Access I can't seem to use with, cte, or rownumber. I'm at a loss as to how to do this so any help would be appreciated.
Query1
BldID
UnitID
ResidentID
1
201
John Smith
1
201
Jane Doe
1
202
Daniel Jones
1
202
Mark Garcia
2
201
Maria Lee
2
201
Paul Williams
2
201
Mike Jones
Desired Output from edited Query
BldID
UnitID
Res1
Res2
Res3
1
201
John Smith
Jane Doe
1
202
Daniel Jones
Mark Garcia
2
201
Maria Lee
Paul Williams
Mike Jones

Answer 1

You can use a Crosstab Query
TRANSFORM Max(Resident.ResidentID) AS MaxOfResidentID
SELECT Resident.BldID, Resident.UnitID
FROM Resident
GROUP BY Resident.BldID, Resident.UnitID
ORDER BY Resident.BldID, Resident.UnitID
PIVOT "Res" & (DCount("*",
"Resident",
"BldID=" & [BldID] & " AND UnitID=" & [UnitID] &
" AND ResidentID<'" & [ResidentID] & "'") + 1);
If you need a constant number of columns (e.g. if you want to create an Access report), then you can add an In clause to this query (before the ;):
In ("Res1","Res2","Res3","Res4","Res5","Res6")
This always creates 6 columns with the same names.
The difficulty is to get the row number per BldID/UnitID group. This is achieved by
DCount(1,
"Resident",
"BldID=" & [BldID] &
" AND UnitID=" & [UnitID] &
" AND ResidentID<'" & [ResidentID] & "'") + 1
where Resident is the name of your table or query. It counts residents having the same BldID and UnitID but having a smaller ResidentID. Adding 1 to this count yields the row number starting at 1. Then the string "Res" is prepended to build the column name.
Note that the residents are listed in alphabetical order form left to right.