Gain insights into DynamoDB, from table creation to security and monitoring. Delve into access control and avoid common mistakes to confidently use this AWS technology.

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DynamoDB is a beautiful piece of technology. This course covers it in depth. You will learn what DynamoDB is, what it can do, and how to use it. You will learn about table creation and go into the details of security and monitoring. Additionally, you will learn how to manage access control in DynamoDB and how to monitor the usage. 

After taking this course you will become confident in using DynamoDB and will have the know-how to avoid those rookie mistakes that people make while using this technology. No matter how familiar you are with AWS technologies, this course has something for you. For the beginner, this course gives a nice flavor of AWS technologies. And for advanced practitioners, this course provides a definitive guide to DynamoDB and related technologies.

DynamoDB Deep Dive: NoSQL for Software Engineers

## Tables
Tables are the basic store of data. We can have multiple tables in our database. These tables are similar to relational database tables. We store data as items in our tables. However, tables in DynamoDB are schema-less. There is no fixed column structure that we have to specify and follow. We can literally put anything inside our table, as long as the primary key is kept unique.



## Items
Items in DynamoDB are similar to the rows in relational databases. An item belongs to a table and can contain multiple attributes. An item in DynamoDB can also be represented as a JSON object (a collection of key-value pairs).
## Attributes
Each individual key-value pair of an item is known as an **attribute**. An item is built from multiple attributes. We can think of attributes as the properties of the item when we think of the item as a JSON object. Values of attributes can have many scalar and composite data types. We will discuss these data types in the next lesson.

## Primary key
Each table in DynamoDB contains a *primary key*. A **primary key** is a special set of attributes. Its value is unique for every item and is used to identify the item in the database. Under the hood, it is used to partition and store the data in order.

There are two types of primary keys:

1. **Partition key:**

   Here, we have a unique key of scalar type (string, number, boolean), which determines the storage partition the item will go into.

2. **Partition key and *Sort key***: 
    
   Here, we have two keys. The *partition key* determines the partition where the item goes into the storage and the *sort key* determines the rank of the item in the partition. Neither of these two keys need to be unique. However, their combination should be unique. 

Let's look at an example of items in a fictional table named "Orders".


# Tables
Tables are the basic store of data. We can have multiple tables in our database. These tables are similar to relational database tables. We store data as items in our tables. However, tables in DynamoDB are schema-less. There is no fixed column structure that we have to specify and follow. We can literally put anything inside our table, as long as the primary key is kept unique.



# Items
Items in DynamoDB are similar to the rows in relational databases. An item belongs to a table and can contain multiple attributes. An item in DynamoDB can also be represented as a JSON object (a collection of key-value pairs).
# Attributes
Each individual key-value pair of an item is known as an **attribute**. An item is built from multiple attributes. We can think of attributes as the properties of the item when we think of the item as a JSON object. Values of attributes can have many scalar and composite data types. We will discuss these data types in the next lesson.

# Primary key
Each table in DynamoDB contains a *primary key*. A **primary key** is a special set of attributes. Its value is unique for every item and is used to identify the item in the database. Under the hood, it is used to partition and store the data in order.

There are two types of primary keys:

1. **Partition key:**

   Here, we have a unique key of scalar type (string, number, boolean), which determines the storage partition the item will go into.

2. **Partition key and *Sort key***: 
    
   Here, we have two keys. The *partition key* determines the partition where the item goes into the storage and the *sort key* determines the rank of the item in the partition. Neither of these two keys need to be unique. However, their combination should be unique. 

Let's look at an example of items in a fictional table named "Orders".


Welcome!

What is DynamoDB?

Creating Tables

Create a Table in DynamoDB

Creating Items

Create Items in a DynamoDB Table

Reading Data

Read Data in a DynamoDB Table

Secondary Index

Secondary Index in a DynamoDB Table

Monitoring

CloudWatch Monitoring for DynamoDB

Access Management

DynamoDB Best Practices

Conclusion

Instagram Stories Feature

DynamoDB Data Model

Tables

Items