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In this video, we are going to understand dynamic DB interactions working with the items and the attributes

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before we developing Node.js Lambda functions.

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We should understand the basics of dynamics.

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After that it will be very clear to interact with dynamic DB from our Node.js lambda functions.

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So the idea is that you should think Dynamic DB is a resources and dynamic DB expose available APIs

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that we can call from our Lambda function.

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We're using the HDC libraries, so let's see how we can interact with V items and the attributes.

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For that reason, we should read the official documentation before writing the function.

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Check the DB item level features for creating item.

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Here is an article about the dynamic DB API and item level API is listed in here in a documentation.

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An item is a collection of attributes.

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Each attribute has a name and value.

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An attribute can be a scholar, asset or document type.

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So dynamic DB provides for operation for basic create, read, update and delete functionality.

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All these operations are automatic.

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You can see in here put item, get item, update item and delete item.

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These are the operations for dynamic DB APIs.

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We can easily see the details if you scroll down.

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We have also batch get and batch write item APIs.

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For example, key topics about reading an item is you remember that when we are running the commands,

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we use the dynamic DB get item command and this is the gate item API that expose from the A list dynamic

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DB and all these code interactions has a different core API that we can find in the Amazon dynamic DB

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API reference documentation.

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If you open the API reference documentation, you can see the list of actions can be done for interacting

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dynamic DB All these APIs can be invoked from the using the CLI and also SDK.

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So last lecture we have used using the SQL commands.

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But in this section we will focus on the invoke these APIs using the dynamic DB SDK libraries.

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So after we have learned the basics of dynamic DB, how we can interact all these methods from our lambda

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function.

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Of course we will use the ADA SDK for JavaScript and version three.

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So this is the best practice and we understood that why we are using this library and these Node.js

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SDK in the last section, because this is a great benefit for reducing the package size and also increasing

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the lambda function performance and a way to avoid to the code start issues.

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Now we will follow these informations and start to develop our Node.js project with using a basic JavaScript

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machine tool and interact with the innovative.