Why your PL/SQL needs to be testable – and how to do it: Part 1
Part 1: What is testable code, why is it important, and first glimpses on practices that can help
2022-04-27
Part 1: What is testable code, why is it important, and first glimpses on practices that can help
2022-04-27
In this article, Jonathan Lewis discusses why you might want to stop the optimizer from unnesting some subqueries and how to control where the optimizer positions each subquery.
2022-04-11
IN and NOT IN subqueries are frequently used in Oracle. Jonathan Lewis explains how the optimizer handles NULL with IN and NOT IN.
2022-03-18
This article looks at the way in which you can convert unmanaged devices to the ASM filter drive in an Oracle system.
2022-03-04
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In this article, we will analyze the various out-of-the-box deployment options Oracle Cloud Infrastructure and Google Cloud Platform offers to host a Microsoft SQL Server database. This information can prove to be handy while deciding on the best cloud provider to host a given application or database.
2022-02-18
4,433 reads
To troubleshoot poorly performing SQL in Oracle, you must understand which transformations the optimizer has made. Jonathan Lewis demonstrates several possible optimizations for one query.
2022-02-09
Oracle added several enhancements to the sequence object in version 12c, including an “identity” column feature. Jonathan Lewis explains how to work with these new features.
2021-09-10
Oracle sequences supply unique numbers that can be used when populating tables. In this article, Jonathan Lewis explains the typical uses of Oracle sequences.
2021-08-04
Using sequences when scaling up with Oracle RAC presents more issues with contention. In this article, Jonathan Lewis explains how to avoid the problems.
2021-05-31
Oracle sequences can be used to create artificial IDs for a table. In this article, Jonathan Lewis explains how they work under-the-hood.
2021-04-14
By Steve Jones
I started to add a daily coping tip to the SQLServerCentral newsletter and to...
By Steve Jones
I started to add a daily coping tip to the SQLServerCentral newsletter and to...
This is one of those things that on hindsight was a stupid problem, but...
Hi Expert, I wanted to calculate max date for prodstatus =5 - min date...
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