Oracle offers a results cache in the database (from 11.2 onwards) and in PL/SQL (again, from 11.2 onwards) which can greatly reduce execution time of repeated statements when insert/update/delete activity is not heavy. The mechanism in PL/SQL, however, may not work as expected with global temporary tables. Using a slightly modified example, Jonathan Lewis looks at what you might see when using this option.
2015-10-22
4,120 reads
Automatic UNDO Management isn't voodoo or black magic, although it can seem that way when it isn't clearly understood. How does Oracle decide how many UNDO segments to create at startup, and what is the underlying goal of the process? David Fitzjarrell investigates.
2015-10-06
3,322 reads
Designing a system with primary keys in mind is not an easy task, and the solutions may not be the simplest. However the effort is well worth the time and trouble when you realize that it's the best way to prevent duplicate data - but how do you choose a primary key? David Fitzjarrell looks at several examples.
2015-08-25
4,312 reads
In this tip, Daniel Calbimonte compares the SQL Server (T-SQL) and Oracle (PL-SQL) extensions of the SQL language. The tip will compare both T-SQL and PL-SQL languages with respect to retrieving data, creating databases, tables, variables, etc.
2015-06-22
4,457 reads
On January 28th 3PM GMT, Randolf Geist will present a free, one-hour webinar analyzing different database query profiles based on a real-world customer case. He'll also look at how these different profiles influence the efficiency of Exadata's features and the new Oracle In-Memory column store option. Register now.
2015-01-23
8,371 reads
In their third live 'Oracle vs. SQL Server' discussion, Jonathan Lewis (Oracle Ace Director, OakTable Network) and Grant Fritchey (Microsoft SQL Server MVP) will look at statistics in Oracle and SQL Server. Expect a lively debate on Oracle vs. SQL Server from two leading RDBMS experts on Jan 23, 2013.
2013-01-22 (first published: 2013-01-08)
2,687 reads
If you want to run an Oracle Package and then execute a web service, copy files or folders, a sequence of tasks, you may need to use SQL Server Integration Services (SSIS).
2012-09-18
2,524 reads
A look at the memory architecture of SQL Server and Oracle, for those of you that may need to provide support for Oracle databases.
2012-02-13
4,396 reads
When a SQL expert moves from Oracle to SQL Server, he can spot obvious strengths and weaknesses in the product that are too familiar to be apparent to the SQL Server DBA. Jonathan Lewis is one such expert: In this article he records his train of thought whilst investigating the mechanics of the SQL Server database engine. The result makes interesting reading.
2010-05-10
3,704 reads
The concluding part of the Oracle / SQL Server comparison looks at error logging, security, installation and finally querying the databases.
2010-04-02
3,828 reads
By Steve Jones
I don’t have SQL Server installed on my laptop. In an effort to keep...
Slow-running queries can degrade your Redshift cluster’s performance and lead to increased costs. Identifying...
By gbargsley
If you've been here before, you know this blog is usually about SQL Server,...
Hi all Can I get some perspective from the community please on performing in-place...
Comments posted to this topic are about the item How Long is a Long...
Comments posted to this topic are about the item T-SQL Trigonometric Functions in SQL...
In SQL Server 2025, a long I/O is recorded in the error log with message 833. How long much an I/O request be outstanding before this message is written to the log?
See possible answers