I have a source table in Oracle that has no key constraints or primary key. Can I ingest data from this table to Snowflake using Python, and how would I handle the lack of a primary key?

Yes, you can ingest the data. Use the Snowflake Python connector to connect to Snowflake and cx_Oracle (or SQLAlchemy) to read from Oracle. Load the data into a staging table in Snowflake using the COPY INTO command or a bulk INSERT. Because the source has no primary key, you cannot rely on natural uniqueness; instead, generate a surrogate key (e.g., a Snowflake sequence or UUID) during the load. If you need to deduplicate, perform a SELECT DISTINCT or use a window function to keep the latest row per business key. After loading, create a unique constraint or primary key on the surrogate column to enforce integrity for future loads. This approach preserves all rows, allows incremental loads, and gives you a stable identifier for downstream processes.