Begin by exporting the data you need from WooCommerce. WooCommerce allows you to export data in CSV format directly from the WordPress dashboard. Navigate to WooCommerce > Products (or Orders, Customers, etc.), click on the "Export" button, and select the relevant data fields you wish to export. Save the file in a CSV format.

Once exported, open the CSV file to ensure that the data is correctly formatted. Check for any inconsistencies or formatting issues that might cause errors during the import process. Ensure that fields match the structure of your Oracle Database table where the data will be imported.

Access your Oracle Database and create a new table that matches the structure of your WooCommerce data. Use SQL commands to define the table schema with appropriate data types and constraints. For example:
```sql
CREATE TABLE WooCommerceData (
ProductID NUMBER,
ProductName VARCHAR2(255),
Price NUMBER,
StockQuantity NUMBER,
...
);
```

SQL*Loader is a bulk loader utility provided by Oracle for high-performance data loading. Ensure that SQL*Loader is installed and configured on your system. It is typically included with Oracle Database installations. This tool will be used to import the CSV data into your Oracle table.

Create a control file which defines how SQL*Loader should read the CSV file and map it to the Oracle table. The control file is a plain text file with instructions for SQL*Loader. Example content:
```
LOAD DATA
INFILE 'path/to/your/data.csv'
INTO TABLE WooCommerceData
FIELDS TERMINATED BY ',' OPTIONALLY ENCLOSED BY '"'
(ProductID, ProductName, Price, StockQuantity)
```

Execute the SQL*Loader command from your command line interface. Navigate to the directory containing your control file and run:
```bash
sqlldr userid=your_username/your_password@your_database control=your_control_file.ctl log=your_log_file.log
```
This command will start the data import process, and SQL*Loader will read the CSV file as specified in the control file and load the data into your Oracle table.

After the SQL*Loader process completes, verify that the data has been loaded correctly. Use SQL queries in your Oracle Database to inspect the data and ensure that all records are present and accurate. For example:
```sql
SELECT * FROM WooCommerceData;
```
Check the log file generated by SQL*Loader for any errors or warnings that occurred during the import process, and address any issues as necessary.
By following these steps, you can successfully migrate data from WooCommerce to an Oracle Database without relying on third-party connectors or integrations.