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AnswerRe: SSIS extraction from GBase and Universe datbases Pin
Mycroft Holmes19-Dec-08 15:35
professionalMycroft Holmes19-Dec-08 15:35 
QuestionHow To Create Non Effect Update Pin
Sam Heller19-Dec-08 0:55
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AnswerRe: How To Create Non Effect Update Pin
Ashfield19-Dec-08 1:47
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GeneralNon Effect Update Pin
David Mujica19-Dec-08 4:36
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AnswerWrap the logic in TSQL Pin
David Mujica19-Dec-08 4:29
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David Mujica19-Dec-08 4:38
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GeneralRe: Wrap the logic in TSQL Pin
Ashfield19-Dec-08 5:02
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GeneralRe: Wrap the logic in TSQL Pin
Wendelius19-Dec-08 5:10
mentorWendelius19-Dec-08 5:10 
David Mujica wrote:
I'm not 100% convinced that your UPDATE statement would do anything, the optimizer might be smart enough to see that no action is actually required


That would be a serious bug. Optimizer cannot make decisions which would compromise or change the logic.

If it would eliminate row updates based on the fact that no data is changed in the statement itself, it also would have to understand trigger logic. Also what if the table contains a timestamp column, foreign keys etc.

Typically optimizers ensure that the logic is not changed and if there is even a slight chance that the logic may be affected, optimizer revokes such permutations because of the uncertainty.

The need to optimize rises from a bad design.My articles[^]

QuestionInstall SQL Database automatically...... [modified] Pin
grks18-Dec-08 20:52
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QuestionLinking tables properly with foreign keys Pin
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Questionsqltransaction.rollback in terms of programming sequence of actions Pin
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QuestionSQLDMO.dll Error Pin
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QuestionHow to creat a consolidat setup for an application built in vb 2005 Pin
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QuestionTable values import to excel Sheet Pin
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Questionsql server 2000 Pin
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