How SQL Query Planning Works - Visualization of PostgreSQL Decisions

The article "The Art of Query Optimization" by J. N. Idzwetzki addresses a crucial topic in the database domain, focusing on the efficient execution of queries. In the opening section, the author explains the importance of query optimization and how it impacts the performance of database systems. He introduces concepts like query cost and execution, emphasizing that poorly written queries can significantly slow down application performance. The article provides practical tips for writing more efficient queries, such as avoiding subqueries that can introduce additional overhead. Furthermore, the author outlines specific techniques, like indexing and using appropriate operators, that can lead to substantial improvements in query execution time. In conclusion, the article summarizes key points and encourages continuous learning and query optimization in daily database work.