The previous installment of this series examined aggregate subquery removal and subquery coalescing, describing the latter as similar in some ways to an inverse for “Or Expansion” and “Join Factorization”. In this instalment, it’s time to take a closer look at Or Expansion and we’ll move on to Join Factorization in the next instalment.
2022-11-30
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2019-03-11
2,174 reads
2019-02-19
5,335 reads
In the world of paradigm shifts, many organizations are looking at the prospect of a technology migration, where capabilities are moved to a new set of technologies, supporting and enabling the business for the future. On other hand, a technology or platform may reach the end of its life for other business reasons, like ease of use, increased cost, etc.
2018-08-07
3,088 reads
An introduction to SQL Server for Red Hat Linux Administrators with a step by step installation.
2016-12-27
1,440 reads
David Fitzjarrell takes a look at why the mutating table error is thrown, why it's not going to create data problems, and how to possibly fix it.
2016-07-01
3,541 reads
Sometimes it's good to re-think how to write a query; set operations can provide performance benefits over 'straight SQL'. In this article, David Fitzjarrell takes a look at one such example in action.
2016-05-25
3,710 reads
Oracle offers a number of security-related settings, but one could definitely create more harm than good. David Fitzjarrell looks at which parameter that is, and why.
2016-03-24
5,227 reads
Defining unique records in an Oracle table is necessary for employee data, and manufacturing part numbers and user names, to name a couple of examples. David Fitzjarrell looks at the various ways uniqueness can be defined, and which method may not be acceptable to third-party applications.
2016-02-26
386 reads
Oracle 12.1.0.2 can throw an ORA-01438 when importing an interval partitioned table. In this post, David Fitzjarrell suggests a work-around until Oracle patches the bug.
2015-12-25
3,295 reads
By Steve Jones
Today’s coping tip is to ask other people about things they’ve enjoyed recently I...
By Steve Jones
Today’s coping tip is to challenge negative thoughts and look for the upside. I’m...
Since changing to the new MVP renewal model, Microsoft MVPs have had until 31...
Hi! Query store provides information on workloads on tempdb How\Steps to setup Extended events...
Hi, I have a table that stores event transactions, the sample data see the...
I am trying to create a natively compiled stored procedure where I need to...
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