You dont need to queries, you can use one query to return the max of each
table and the max between the two
Create a query add both tables to the query without a link between them
Try this
SELECT Max(MyTable1.MyNumber) AS MaxMyNumber1, Max(MyTable2.MyNumber) AS
MaxMyNumber2,
IIf(Max([MyTable1].[MyNumber])>Max([MyTable2].[MyNumber]),Max([MyTable1].[MyNumber]),Max([MyTable2].[MyNumber])) AS MaxBetweenTheTwo
FROM MyTable1, MyTable2
If Both fields are on the same table then
SELECT Max(MyTable.MyNumber1) AS MaxMyNumber1, Max(MyTable.MyNumber2) AS
MaxMyNumber2,
IIf(Max([MyTable].[MyNumber1])>Max([MyTable].[MyNumber2]),Max([MyTable].[MyNumber1]),Max([MyTable].[MyNumber2])) AS MaxBetweenTheTwo
FROM MyTable1