Final answer:
If a make table query is run and the destination table already exists in Access, the query will fail and an error message will be displayed because Access won't overwrite an existing table.
Step-by-step explanation:
If a make table query is run in Microsoft Access and the destination table already exists, Access will not overwrite or alter the existing table. Instead, the query will fail and Access will display an error message indicating that the table cannot be created because a table with the same name already exists. To successfully run the make table query, you would need to delete the existing table or modify the query to create a table with a different name.
If a make table query is run and the destination table already exists, Access will prompt the user to confirm whether they want to overwrite the existing table. If the user chooses to overwrite, Access will delete the existing table and create a new table with the same name. If the user chooses not to overwrite, the query will not make any changes to the existing table.