Is there a way to perform a cross join or Cartesia

Question

At the moment, I cannot use a typical database so am using excel temporarily. Any ideas?

The

Answer 1

This article helped me perform a cross join in Excel:

http://www.excelguru.ca/blog/2016/05/11/cartesian-product-joins-for-the-excel-person/

It requires the Microsoft Add in Microsoft Power Query For Excel https://www.microsoft.com/en-us/download/details.aspx?id=39379

Answer 2

Try using a CROSS JOIN. Read more at MSDN

You can use the expression CROSSJOIN(table1, table2) to create a cartesian product.

Answer 3

You have 3 dimensions here: dim1 (ABC), dim2 (123), dim3 (XYZ).

Here is how you make a cartesian product of 2 dimensions using standard Excel and no VBA:

1) Plot dim1 vertically and dim2 horizontally. Concatenate dimension members on the intersections:

2) Unpivoting data. Launch pivot table wizard using ALT-D-P (don't hold ALT, press it once). Pick "Multiple consolidation ranges" --> create a single page.. --> Select all cells (including headers!) and add it to the list, press next.

3) Plot the resulting values vertically and disassemble the concatenated strings

Voila, you've got the cross join. If you need another dimension added, repeat this algorithm again.

Cheers,

Constantine.

Answer 4

Using VBA, you can. Here is a small example:

Sub SqlSelectExample()
'list elements in col C not present in col B
    Dim con As ADODB.Connection
    Dim rs As ADODB.Recordset
    Set con = New ADODB.Connection
    con.Open "Driver={Microsoft Excel Driver (*.xls)};" & _
           "DriverId=790;" & _
           "Dbq=" & ThisWorkbook.FullName & ";" & _
           "DefaultDir=" & ThisWorkbook.FullName & ";ReadOnly=False;"
    Set rs = New ADODB.Recordset
    rs.Open "select ccc.test3 from [Sheet1$] ccc left join [Sheet1$] bbb on ccc.test3 = bbb.test2 where bbb.test2 is null  ", _
            con, adOpenStatic, adLockOptimistic
    Range("g10").CopyFromRecordset rs   '-> returns values without match
    rs.MoveLast
    Debug.Print rs.RecordCount          'get the # records
    rs.Close
    Set rs = Nothing
    Set con = Nothing
End Sub

Answer 5

Here is a very easy way to generate the Cartesian product of an arbitrary number of lists using Pivot tables:

https://chandoo.org/wp/generate-all-combinations-from-two-lists-excel/

The example is for two lists, but it works for any number of tables and/or columns.

Before creating the Pivot table, you need to convert your value lists to tables.