Range comparisons vs. IN/EXISTS

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what is the difference between in and exists in sql Informational

• Impact of compressed data Explain the concept of predicate pushdown and how it relates to the optimization of subqueries used with IN or EXISTS, especially in distributed query processing.
• Comparison table of SQL IN and EXISTS
• IN limitations with extensive data How does the EXISTS operator handle large subqueries in comparison to the IN operator?
• Simplifying IN with temporary data Discuss the trade-offs between using a temporary table with an index versus a large IN list.
• Scalability of IN with varying subquery size Similarly, how does the performance of EXISTS with a subquery that finds a match early compare to one that needs to scan many rows?
• Structuring queries for better optimization How does the number of joins in a query that also includes IN or EXISTS subqueries affect the overall performance and the optimizer's choices?
• Balancing complexity and performance How does the use of database triggers for auditing or maintaining related data affect the performance of INSERT, UPDATE, or DELETE statements that might interact with tables involved in IN or EXISTS subqueries?
• Factors influencing IN/EXISTS execution Are there any differences in error handling or behavior when a subquery used with IN or EXISTS returns no rows?
• Alternative strategies for known problems Consider a scenario where the subquery in an EXISTS clause is very simple and only checks for the existence of a single row. How does its performance compare to other approaches?
• Columnstore vs. rowstore for IN/EXISTS