Google Sheets Text Join to join character from columns into row

问题

have data like this

and want result like this

using this formula:

=ARRAYFORMULA(REGEXREPLACE(TRIM(SPLIT(TRANSPOSE(QUERY(QUERY(
 IF(D2:D<>"", {C2:C&"♠", D2:D&","}, ),
 "select max(Col2) where Col1 is not null group by Col2 pivot Col1")
 ,,999^99)), "♠")), ",$", ))

make the result like this

Can someone figure it out, How to fix this formula? Thanks

来源：https://stackoverflow.com/questions/62670569/google-sheets-text-join-to-join-character-from-columns-into-row