I do not understand, but slices look like they use different databases, but I have only one database that I want to use, but have 2 different forms in aapsheet to send different data to the database, so only that data will be filled in to the database that is in that form
Slices give you exactly what you want. Different sets of contents (rows and columns) and different sets of behaviors for the same table.
Please study the guide and tell me should you find any doubt.