You can query Snowflake with `pyodbc` by following these steps:
1. Install the Snowflake ODBC Driver: Download and install the Snowflake ODBC driver for your operating system from the Snowflake website.
2. Install `pyodbc`: Install the `pyodbc` package in your Python environment using pip or conda.
3. Create a DSN: Create a Data Source Name (DSN) for your Snowflake account using the ODBC Data Source Administrator. The DSN should include the Snowflake account name, user name, and password.
4. Connect to Snowflake: Use the `pyodbc.connect()` function to establish a connection to Snowflake, specifying the DSN you created in Step 3. For example:
conn = pyodbc.connect(‘DSN=my_snowflake_dsn’)
5. Execute queries: Use the `cursor.execute()` method to execute SQL queries against Snowflake, and the `cursor.fetchall()` method to retrieve the query results. For example:
cursor = conn.cursor()
cursor.execute(‘SELECT COUNT(*) FROM my_table’)
result = cursor.fetchall()
This will execute a simple SQL query that counts the number of rows in a table called `my_table`, and prints the result.
Overall, querying Snowflake with `pyodbc` is a straightforward process that can be accomplished using familiar Python tools and libraries.