Top 5 tips for performance tuning using execution plan in SQL Server

Top 5 tips for performance tuning using execution plan
Top 1. Search for Lazy Spool Operator, points to duplicate aggregation operations. This is most expensive operator.
Top 2: Hash match, points to missing index.
Top 3: Non SARGable queries, use of functions or expression in where conditions. Example cast(column as date)='2023-01-01', Left(col,2)='SA', etc
Top 4: Partition Elimination
Top 5: Bad Views
#shorts

[@blackisblack22]

How to refactor CAST(COL AS DATE) and CAST(COL,2) to make it sargable?

[@techsapphire]

for date time you can use Between clause example Col between '2023-01-01' and '2023-01-02', for left you can use Like or computed column with index

[@blackisblack22]

@@techsapphire Thank you 🤝