I’m trying to create a database website using also sqlite3 python’s library but I don’t know why when I use the

I’m trying to create a database website using also sqlite3 python’s library but I don’t know why when I use the DROP TABLE IF EXISTS table_name; statement I receive this error on the EXISTS word: “period” expected instead of this input.
I tried to add a period in every position near EXISTS word but don’t work and i get other errors.