Topic 6330 min readStructured Tutorial
SQL SELECT Queries: Query Best Practices
Quick Answer
SQL SELECT query best practices include writing clear, readable queries, using explicit column lists instead of SELECT *, applying filtering with WHERE clauses, leveraging indexes, and avoiding unnecessary computations to improve performance and maintainability.
Learning Objectives
- Understand key best practices for writing efficient SQL SELECT queries.
- Learn how to improve query readability and maintainability.
- Identify common pitfalls and how to avoid them in SQL queries.
Introduction
SQL SELECT queries are fundamental to retrieving data from relational databases. Writing them efficiently and clearly is essential for performance and maintainability.
Following best practices helps avoid common mistakes that can lead to slow queries or confusing code.
Write queries as if the next person maintaining them is a violent psychopath who knows where you live.
