how do you query a dynamodb table example

#HOW DO YOU QUERY A DYNAMODB TABLE EXAMPLE HOW TO#

AWS SDK supports a variety of languages like Java, JavaScript. Using AWS SDKs you can make the most of DynamoDB. Using CLI, you can simply open your command prompt and type the relevant commands and access the table. You can access DynamoDB simply by clicking here. Accessing Amazon DynamoDBĪccessing DynamoDB is very easy and can be done using the following methods:

#HOW DO YOU QUERY A DYNAMODB TABLE EXAMPLE HOW TO#

These are the different terms used, without any further delay let’s proceed with the DynamoDB tutorial and find out how to access a table. Here, each event is represented by a stream record and if this service is enabled, then you get a new event every time when there is a new item created, an item is updated or an item is deleted. This is an additional/optional feature provided by DynamoDB to keep a track of data modification events in a table. DynamoDB has these secondary indexes that help you achieve this additional access. Car Details table with Brand name and Model number as a composite primary key.Ī secondary index can be understood as the attribute that lets you query the data, with or without the help of a Primary key. The primary component is the Partition key and the secondary component is the Sort key. This type of key is generally made up of two items. Employee ID in Employee records table.Ī composite primary key is also known as Partition key and Sort key. DynamoDB uses Partition key’s value to distinguish items in a table. DynamoDB supports two types of Primary key.Ī simple primary key is also known as Partition key, this is basically a single attribute. Two items cannot have a similar primary key. Employee ID is the primary key for the table Employee records. Hence, while inserting an item into the table, a primary key attribute is a must. Employee Name.Ī primary key is a unique attribute that is necessary while creating a table, it cannot be null at any given point. An attribute is a single field that is attached to an item.For example, an item in Employee records will identify a single employee. You can also understand an item as a set of attributes that can uniquely define your entry in a table. An item is a set of attributes in a table.

Taking an example of Employee records, you will have Employee Name, Employee ID, Address and Phone Number all such items will be stored in a table.

A table can be visualized as a group of items.

Here with DynamoDB, everything is kept simple, the terms used with DynamoDB are easy to understand which makes it unique from the rest of the Database services. Now that you know what is DynamoDB, let’s move further in this Amazon DynamoDB tutorial and introduce you to the terms used here. A table holds a set of items, an attribute is the simplest element that stores data without any further division and item holds a set of attributes. It is a very simple and small API that follows key-value method to store, access and perform advanced data retrieval.ĭynamoDB comprises of three fundamental units known as table, attribute, and items. With DyanmoDB, you can expect a good performance even when it scales up. It can store any amount of data and serve any amount of traffic.

It requires only a primary key and doesn’t require a schema to create a table. Demo: Creating, Inserting And Querying A Table In DynamoDBĪmazon DynamoDB is a fully managed NoSQL service that works on key-value pair and other data structure documents provided by Amazon.In this Amazon DynamoDB tutorial, I will be discussing the following topics: If you wish to make a career in cloud computing and explore the different services provided by AWS, take a look at the live courses provided by Edureka. In this Amazon DynamoDB tutorial, I will be discussing the new and fast way of storing and retrieving data using DynamoDB. Traditional database systems which were initially used, are not the go-to solution today because of the dynamic change in requirements and type of data procured. These days, databases have become the backbone for any company irrespective of how big they are. DynamoDB is a fully managed NoSQL database service provided by Amazon.

How do you query a dynamodb table example