Description: A global secondary index is a data structure that allows querying a database using a partition key and, optionally, a sort key. Unlike a primary index, which is based on the primary key of the table, the global secondary index provides an alternative way to access data, facilitating the search and retrieval of information more efficiently. This type of index is particularly useful in distributed databases and systems that handle large volumes of data, as it optimizes queries and improves overall system performance. The partition key determines how data is distributed across different nodes, while the sort key allows for organizing data within each partition. This means users can perform complex queries without needing to scan the entire table, saving time and resources. In summary, the global secondary index is a powerful tool for enhancing efficiency in database management, allowing for faster and more flexible access to stored information.
