1. T-SQL Habits & Practices That Can Kill Performance
Vern Rabe, owner, RabeData, LLC

2. OregonSQL User Group www.OregonSQL.org
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4. Vern Rabe Owner, RabeData, LLC
Portland, OR independent consultant, trainer
MCTA, MCDBA, MCSE, MCITP
Co-Leader Oregon PASS chapter
Working with/focusing on SQL Server since 1993, starting with SQL Server 4.21a
My first PC had a 10MB hard drive
Vern Rabe
Owner, RabeData, LLC
/VernRabe
@VernRabe

5. Vern Rabe

6. Habits & Patterns
10. 9. 8. 7. 6. 5. 4. 3. 2. 1.
Using UNION instead of UNION ALL Using Superfluouse ORDER BY Not JOINing on keys Having too many JOINs Over-using or mis-using views Using user defined scalar functions Ignoring the transaction log Ignoring data types Not using OPTION (RECOMPILE) Not making predicates SARGABLE

7. Questions?
Vern Rabe
@VernRabe

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