SQL Server 2005 – Reading and Interpreting Query PlansSQL Server 2005 – Reading and Interpreting Query PlansFlorin CardaşimLead developerRomSoft, IAŞI, http://www.rms.ro

Florin CardaşimLead developerRomSoft, IAŞI, http://www.rms.ro

AgendaAgenda

• Graphic, Xml and Text query plans• One-table SELECT • Table Join SELECT• INSERT, UPDATE, DELETE

• Graphic, Xml and Text query plans• One-table SELECT • Table Join SELECT• INSERT, UPDATE, DELETE

http://en.wikipedia.org/wiki/Microsoft_SQL_Server

Sql Server ArchitectureSql Server Architecture

DemoDemo

The tools: Management Studio Server Profiler Tuning Advisor

Execution plans representations: Text (SHOWPLAN_ALL, SHOWPLAN_TEXT,

STATISTICS PROFILE) XML (SHOWPLAN_XML, STATISTICS XML) Graphical

The tools: Management Studio Server Profiler Tuning Advisor

Execution plans representations: Text (SHOWPLAN_ALL, SHOWPLAN_TEXT,

STATISTICS PROFILE) XML (SHOWPLAN_XML, STATISTICS XML) Graphical

Clustered index: stores the data along with the lookup values of the index and sorts the data physically; implemented as B-tree(balanced)

Non-clustered index: sorts the columns included in the index, but it doesn’t sorts the data

Q&AQ&A

Thank you!Thank you!

Florin CardaşimLead developerRomSoft, IAŞI, http://www.rms.ro

Florin CardaşimLead developerRomSoft, IAŞI, http://www.rms.ro