Table of Contents Introduction SQL Server Indexes 1. Clustered Index 2. Non-Clustered Index 3. Unique Index 4. Full-Text Index PostgreSQL Indexes 1. B-Tree Index 2. Hash Index 3. Unique Index…
Table of Contents One-to-One Relationship One-to-Many Relationship Many-to-Many Relationship Importance of Relationships In relational databases, relationships are crucial for organizing and linking data across different tables. They define how records…
Table of Contents 1. Primary Key 2. Unique Key 3. Foreign Key 4. Composite Key 5. Candidate Key 6. Super Key 7. Alternate Key 8. Surrogate Key 9. Summary 1.…
Functions in databases allow you to encapsulate reusable logic, perform computations, and return results. This guide covers how to write functions in both SQL Server and PostgreSQL, including examples, advanced…