DynamoDB - Local Secondary Indexes and Global Secondary Indexes

Introduction:
DynamoDB is a NoSQL database provided by Amazon Web Services. One of the key features of DynamoDB is its ability to create indexes, which enable faster querying of data. In this article, we will discuss the two types of indexes available in DynamoDB - Local Secondary Indexes and Global Secondary Indexes.

Local Secondary Indexes (LSI) are indexes that use the same partition key as the original table but a different sort key. LSIs are created when the table is first created and can only be used for querying specific data columns.

Global Secondary Indexes (GSI) use a different partition key and sort key from the original table. This allows for a different view of the data and gives greater flexibility to the user as GSIs can be created at any time after the table is created.

Conclusion:
In conclusion, DynamoDB indexes provide a faster and more efficient way of querying data. LSIs are useful for specific data columns and must be created at the same time as the table, while GSIs offer greater flexibility as they can be created at any time and use different partition and sort keys. Understanding the differences between these two types of indexes is important in order to effectively utilize DynamoDB's capabilities.

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