Optimize SQL Query Using Execution Plan - Cuardach Físeáin

SQL performance tuning and query optimization using execution plan

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SQL performance tuning and query optimization using execution plan

Performance tuning begins with understanding execution plan and finding & fixing expensive operators one by one in below flow: First Lazy spool: Lazy spool is most expensive operator among all, which happens because of duplicate aggregation. We can remove duplicate aggregation by temporary tables, cte, etc. Second Hash match: which is always ...

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