Installing DynamoDB: 1. Download DynamoDB: Download the installation file of DynamoDB from the official AWS website. Choose the appropriate version for your operating system. 2. Unzip the installation file: Unzip the downloaded installation file into a directory of your choice. 3. Set up environment variables: Add the path of the unzipped folder to your system environment variables. 4. Start DynamoDB: Run the following command in the command line to start DynamoDB:

java -Djava.library.path=./DynamoDBLocal_lib -jar DynamoDBLocal.jar -sharedDb

Steps for using DynamoDB:
1. Create a table: Use the AWS SDK or AWS console to create a new DynamoDB table. When creating the table, specify the table name and primary key.
2. Insert data: Use the PutItem operation to insert one or more items into the table. When inserting data, specify the items and values to be inserted.
3. Query data: Use the Query or Scan operation to retrieve data from the table. Query is used to retrieve data based on the primary key, while Scan can be used for global scanning throughout the entire table.
4. Update data: Use the UpdateItem operation to update data in the table. When updating data, specify the items and values to be updated.
5. Delete data: Use the DeleteItem operation to delete data from the table. When deleting data, specify the items and values to be deleted.
6. Perform batch operations: Use the BatchWriteItem operation to perform batch insert, update, or delete operations. When performing batch operations, specify the operations to be executed and related parameters. Please note that the above operations are examples of using the AWS SDK, you can also use the AWS console or other tools that support DynamoDB for operations.