Prompt Title: Connect to DB2 AS400.

To connect to DB2 AS400 from Databricks, you can follow these steps:

1. Install the IBM iAccess ODBC Driver on your Databricks cluster. You can download the driver from the IBM website.

2. Configure a User DSN or System DSN for the ODBC Driver. To do this, go to the User DSN or System DSN tab and click the Add button. Select the IBM i Access ODBC Driver from the list of installed drivers. Click Add. Choose a Data Source Name and create key-value pairs to set the mandatory ODBC configuration and connection parameters.

3. In Databricks, create a new notebook or open an existing one. In the first cell, import the necessary libraries:

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import os
import jaydebeapi

4. Set the JDBC connection parameters using the DSN created in step 2:

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jdbc_url = "jdbc:odbc:<dsn_name>"

Replace <dsn_name> with the name of the DSN you created in step 2.

5. Connect to the database using the following code:

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conn = jaydebeapi.connect("com.ibm.as400.access.AS400JDBCDriver", jdbc_url, ["<username>", "<password>"])

Replace <username> and <password> with your database credentials.

6. Once connected, you can execute SQL queries using the conn object:

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curs = conn.cursor()
curs.execute("SELECT * FROM <table_name>")
rows = curs.fetchall()
for row in rows:
    print(row)

Replace <table_name> with the name of the table you want to query.

These steps should allow you to connect to DB2 AS400 from Databricks using the IBM iAccess ODBC Driver.