How to load data from IBM Db2 to DynamoDB

First, ensure you have access to both IBM Db2 and AWS environments. Install necessary command-line tools such as `db2cli` for interacting with Db2 and AWS CLI for DynamoDB operations. Make sure you have the necessary permissions to read from Db2 and write to DynamoDB.

Use a SQL query to extract the required data from your Db2 database. You can use the `db2` command-line interface to run a query and export the results to a CSV file. For example, use a command like:
```
db2 "EXPORT TO data.csv OF DEL MODIFIED BY NOCHARDEL SELECT * FROM your_table"
```
This will create a CSV file with your data.

Write a script (using Python, for example) to parse the CSV file and transform the data as needed. DynamoDB requires data to be in JSON format and also requires specific data types for its attributes. Convert the CSV rows into JSON objects suitable for DynamoDB. Ensure you handle any necessary data type conversions (e.g., strings, numbers) according to your DynamoDB schema.

Ensure your AWS CLI is configured with the appropriate IAM credentials that have permissions for DynamoDB operations. Use the `aws configure` command to set up your credentials, specifying your access key, secret key, region, and output format.

Before inserting data, create the necessary DynamoDB table if it doesn't already exist. Use the AWS CLI command:
```
aws dynamodb create-table --table-name YourTableName --attribute-definitions AttributeName=YourKey,AttributeType=S --key-schema AttributeName=YourKey,KeyType=HASH --provisioned-throughput ReadCapacityUnits=5,WriteCapacityUnits=5
```
Customize the command with your specific table schema and throughput settings.

Write a script to insert the transformed JSON data into DynamoDB. Use the AWS CLI `batch-write-item` command or the AWS SDK for your language of choice to perform batch write operations. This helps reduce the number of API calls and improves performance, although note that batch operations have a limit of 25 items per batch.

Example using AWS CLI:
```bash
aws dynamodb batch-write-item --request-items file://batch-data.json
```
Create a JSON file (`batch-data.json`) that contains the batch requests formatted according to DynamoDB's batch write item specifications.

After loading the data, verify that the data in DynamoDB matches the data in Db2. You can do this by running queries on both databases and comparing the results. This can be automated using scripts to fetch a sample of data from both sources and check for consistency in terms of data correctness and completeness.

By following these steps, you can transfer data from IBM Db2 to DynamoDB without relying on third-party connectors or integrations.