Overview
Indexes are special data structures in databases that help speed up the retrieval of rows from a table. They work like an index in a book, allowing the database to find data quickly without scanning the entire table. Understanding how indexes work is crucial for optimizing database performance and ensuring efficient data access.
📚 Key Learning Objectives
- ✓ Define what an index is in a database context.
- ✓ Explain the purpose of using indexes.
- ✓ Identify different types of indexes available.
- ✓ Demonstrate how to create an index in SQL.
- ✓ Analyze the impact of indexes on query performance.
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