DB2 SQL Join: Here are Best Practices

List of performance tuning tips in SQL joins you need to follow.

Response time is determined mostly by the number of rows participating in the join
Provide accurate join predicates Provide accurate join predicates
Never use a JOIN without a predicate
Join ON indexed columns Join ON indexed columns
Use Joins over subqueries

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Srini

Data Engineer with deep AI and Generative AI expertise, crafting high-performance data pipelines in PySpark, Databricks, and SQL. Skilled in Python, AWS, and Linux—building scalable, cloud-native solutions for smart applications.