DynamoDB: Batch Get (Guide w/ Code Examples)

DynamoDB DocumentClient provides a function named batchGet to retrieve multiple items at once. Behind the scenes, it calls BatchGetItem function and can retrieve items in batches of 100 or fewer records.

const AWS = require('aws-sdk');
const dynamo = new AWS.DynamoDB.DocumentClient();

const params = {
    RequestItems: {
        "TableName": [
            {
                "Keys": [
                    { "key1": "value1" },
                    { "key2": "value2" },
                    //...
                ],
                "ProjectionExpression": "attribute_name1, attribute_name2"
            }
        ]
    }
};

dynamo.batchGet(params, function(err, data) {
    if (err) {
        console.log(err);
    } else {
        console.log(data);
    }
});