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No Math In Where Clause
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Don’t use arithmetic operators on a column in the where clause
You will get an index scan instead of a seek. It is better to move the operation away from the column.
- SELECT * FROM Orders WHERE OrderID*3 = 33000
- SELECT * FROM Orders WHERE OrderID = 33000/3
Take a look at the execution plan of these two queries
Contributed By: --SQLDenis 15:26, 31 May 2008 (GMT)
Part of SQL Server Programming Hacks - 100+ List
Section Query Optimization
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