What is Indexing and What are it's Types
When working with large databases, you might notice that retrieving data can sometimes be slow. This is where indexing comes into play. Indexing helps the database find and retrieve data faster, similar to how an index in a book helps you quickly find a topic. In this post, I’ll explain what indexing is and the different types of indexes in simple terms. 1. What is Indexing? An index in a database is like a roadmap that helps you find specific information faster. Instead of scanning the entire table, the database can use the index to quickly locate the row you're looking for. It improves the performance of queries, especially those with SELECT , WHERE , or JOIN clauses. Why is Indexing Important? Without an index, the database has to scan every row in a table to find what it’s looking for. This process is called a "full table scan," and it can be slow, especially in large databases. Indexing speeds up this process by narrowing down the search area. Example: --...