SELECT DISTINCT premises_type FROM premises
What are all the distinct premise types?
[Schema (values) (types)]: | customers_campaigns_ecommerce |  Premises : premise_id (text) , premises_type (number) , premise_details (text) | Products : product_id (text) , product_category (number) , product_name (text) | Customers : customer_id (text) , payment_method (number) , customer_name (text) , customer_phone (text) , customer_email (number) , customer_address (text) , customer_login (text) , customer_password (number) | Mailshot_Campaigns : mailshot_id (text) , product_category (number) , mailshot_name (text) , mailshot_start_date (text) , mailshot_end_date (number) | Customer_Addresses : customer_id (text) , premise_id (number) , date_address_from (text) , address_type_code (text) , date_address_to (number) | Customer_Orders : order_id (text) , customer_id (number) , order_status_code (text) , shipping_method_code (text) , order_placed_datetime (number) , order_delivered_datetime (text) , order_shipping_charges (text) | Mailshot_Customers : mailshot_id (text) , customer_id (number) , outcome_code (text) , mailshot_customer_date (text) | Order_Items : item_id (text) , order_item_status_code (number) , order_id (text) , product_id (text) , item_status_code (number) , item_delivered_datetime (text) , item_order_quantity (text);