Hi @jjpreston29 ,
You could add a unique column in the excel table as a key column to check if the record exists.
Then you could use Filter to filter records in a table by the value of the key column in Sql table.
Use length() function to check if the record exists, if yes, update record; if no, create a new record.
If the type of key column is number, you could remove the single quote outside Dynamic content. And the unique column could not be empty.
Image reference:


Hope this helps.
Best Regards,