Providing support or instructions for making UNION queries is not something that we can do, unfortunately. You could, perhaps, read
this article online, which explains how to use the UNION statement and which conditions have to be met. Playing around with the UNION statement in order to combine two or several reports can be tricky, but is technically possible. Keep in mind though:
- There needs to be exactly the same number of columns after both SELECT statements.
- Not only does the number of columns have to be the same but datatypes must also be equal to one another.
If the number of fields you are trying to combine is limited, you could also use the Coalesce function instead of UNION. This can be implemented more easily and quickly.