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www.dbaglobe.com | ||
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sookocheff.com
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| | | | | Title and Author of Paper Access Path Selection in a Relational Database Management System. P. G. Selinger et al. Summary This paper describes methods of the SQL query optimizer for determining the cost of satisfying a query. It also describes methods for choosing among several competing methods. What are the motivations for this work? SQL is a high-level language where requests for data are stated non-procedurally. The user is not expected to need any knowledge of how the data is stored in the database or how it is retrieved. Thus, it is up to the DBMS to choose an appropriate access path for data retrieval on the users behalf. By designing the database in this fashion, we preserve data independence, where a users view of the data is independent of the data... | |
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www.bobbydurrettdba.com
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| | | | | We have been discussing query tuning at work and I've come back to an example of the Oracle optimizer choosing the wrong plan due to an error in its calculation of the number of rows returned... | |
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antognini.ch
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| | | | | [AI summary] The blog post discusses various Oracle Database-related topics, including query optimization, performance issues, and script usage for documentation downloads. | |
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dataeducation.com
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| | | This month's T-SQL Tuesday is hosted by Jorge Segarra, the "SQL Chicken." The topic is rather open ended: What is your favorite new(ish) SQL Server feature? Love the DACPAC? Can't wait for PDW? Post about it and tell us why! In other T-SQL Tuesday news, we now have a logo. Those of you who are [...] | ||
