使用 Python 的 ETL 和 ELT
Jake Roach
Data Engineer


pandas 提供 .to_sql() 将数据持久化到 SQL
nameconif_existsindexindex_label# Create a connection object
connection_uri = "postgresql+psycopg2://repl:password@localhost:5432/market"
db_engine = sqlalchemy.create_engine(connection_uri)
# Use the .to_sql() method to persist data to SQL
clean_stock_data.to_sql(
name="filtered_stock_data",
con=db_engine,
if_exists="append",
index=True,
index_label="timestamps"
)
验证数据按预期持久化很重要。
# Pull data written to SQL table
to_validate = pd.read_sql("SELECT * FROM cleaned_stock_data", db_engine)
# Validate counts, record equality, etc
...
使用 Python 的 ETL 和 ELT