Understanding Database Indexing

Database indexing is used to facilitate faster data retrieval by creating a separate data structure that contains pointers or references to the actual data in a table. Indexing helps optimize disk operations and improve search performance in databases. There are different types of indexing, such as B-tree indexing and LSM tree indexing. The sequence of columns in a composite index is important for efficient searching. Certain considerations should be made when using indexes in queries.