Difference between Amazon DynamoDB and Amazon SimpleDB

1. Amazon DynamoDB :
Amazon DynamoDB is a fully-managed database and supports both document and key-value data models. Features are as follows – fast and flexible NoSQL database service for all applications that need consistent, single-digit millisecond latency at any scale. It is a hosted, scalable database service by Amazon with the data stored in the Amazon cloud.

2. Amazon SimpleDB :
It is a hosted simple database service by Amazon, with the data stored in the Amazon Cloud. It is Amazon is a web service for running queries on structured data in real-time. This database is written in Erlang by Amazon.com. It has the following features – high availability and flexibility, with little or no administrative burden.

Difference between Amazon DynamoDB and Amazon SimpleDB :

S.NO.	Amazon DynamoDB	Amazon SimpleDB
1.	Developed By Amazon in 2012.	Developed By Amazon in 2007.
2.	It is a hosted, scalable database service by Amazon with the data stored in the Amazon cloud.	It is a hosted simple database service by Amazon, with the data stored in the Amazon Cloud.
3.	It supports the ACID property.	It does not support the ACID property.
4.	It supports predefined data types such as float or date	It does not support predefined data types such as float or date
5.	Its Primary database model is Document store and Key-value store.	Its primary database model is the Key-value store.
6.	It does not offers an API for user-defined Map/Reduce methods. But maybe implemented via Amazon Elastic MapReduce (Amazon EMR).	It does not offer an API for user-defined Map/Reduce methods.
7.	It supports sharding as a partitioning method.	It does not support partitioning methods.
8.	It supports secondary indexes.	It also supports secondary indexes and all columns are indexed automatically.
9.	The programming languages supported are .Net, ColdFusion, Erlang, Groovy, Java, JavaScript, Perl, PHP, Python, and Ruby.	The programming languages supported are .Net, C, Erlang, C++, Java, PHP, Python, Scala, and Ruby.