Database Normalisation Questions
Indexes play a crucial role in database normalization by improving the performance and efficiency of data retrieval operations. They are used to speed up the search and retrieval of data from a database by creating a separate data structure that allows for quick access to specific data values.
In the context of database normalization, indexes are typically created on primary key and foreign key columns. Primary key indexes ensure the uniqueness of each record in a table, while foreign key indexes facilitate efficient joins between related tables.
By using indexes, database systems can avoid scanning the entire table to find specific data, resulting in faster query execution times. This helps to optimize database performance, reduce disk I/O, and enhance overall system efficiency.