...Select the database to merge, upload the ini file in step 1.
The code scans all tables of the source db and compares them to the target db
1. If the table in the source db does not exist in the destination db -> create the table in the destination db
2. If the table in the source db already exists in the destination db, it will browse all the columns in the source db's table. If the column in the source db does not exist in the target db's table, it will add this column for the table in the target db in the correct data type, default value, ... of the column in the source db table.