Ms Access Query: Concatenating Rows through a query

You need a function to do the concatenation.

Microsoft Access condense multiple lines in a table

Example using your data:

Select T.ColumnA  , GetList("Select ColumnB From Table1 As T1 Where T1.ColumnA = " & [T].[ColumnA],"",", ") AS ColumnBItemsFrom Table1 AS TGroup By T.ColumnA;

Here's an outstanding link re: how to do this from within SQL by calling a function. The instructions are exceptionally clear & the function is written for you so you can just copy, paste & go. Even someone with no knowledge of VB can easily implement it:Concatenate values from related records

this can be very difficult to obtain. If you MUST do it in a query and not a function, the problem that you will run into is the limit of the number of rows you can concatenate into one column. So far the only way that i have found to achieve this is via iif statements.

SELECT test1.ColumnA AS ColumnA, First([test1].[ColumnB]) & IIf(Count([test1].[ColumnB])>1,"," & Last([test1].[ColumnB])) AS ColumnBFROM test1GROUP BY test1.ColumnA;

returns:

ColumnA  ColumnB 1      abc,xyz 2      efg,hij 3      asd

This will return the first and the last only, but I'm sure with a little work you could work out the Choose function, but like I said you would have to add more iif statements for each additional item you want to add, hence the limitation.