Additional Articles


Technical Article

What a Data Warehouse is Not

Recently, I was at a conference, and I heard the following discussion about what a data warehouse was. One person suggested that a data warehouse was really all the old legacy systems connected by software that could access the data. By calling such a contraption a data warehouse, the organization could avoid having to do the hard and complex work of integration. There are so many problems with this federated approach to a data warehouse that they are almost not worth repeating here. But (once again!) here goes.

2009-11-09

6,637 reads

Technical Article

Using T-SQL CROSS APPLY and OUTER APPLY

That said, even though my personal focus is pretty much OO, I still miss stuff. SQL Server 2005 came out with the CROSS APPLY and OUTER APPLY operators and I have just started learning how to use APPLY in the last month or so. When I think I have it figured out, I am fortunate enough that some of you are interested in reading about my understanding of the technology.

2009-11-06

7,434 reads

External Article

SQL Server Unique Constraints for Large Text Columns

We are storing large text and URLs that are over 900 bytes in some of our tables and have a requirement to enforce uniqueness in those columns. But SQL Server has a limitation that index size can't be over 900 bytes. How do I enforce uniqueness in these columns and is it possible to achieve this in SQL Server 2005 and above? What are my different options to solve this problem? I heard that we can use CHECKSUM to create a hash, but is it possible to avoid collisions in the hash value as we are storing millions of rows?

2009-11-05

3,006 reads

Blogs

A New Word: los vidados

By

los vidados – n. the half-remembered acquaintances you knew years ago, who you might...

In-Person CISA Training – April 13-16, 2026

By

I will be leading an in-person Certified Information Systems Auditor (CISA) exam prep class...

EightKB 2026

By

EightKB is back again for 2026! The biggest online SQL Server internals conference is...

Read the latest Blogs

Forums

query to track time spent on individual tasks in SSIS

By water490

Hi everyone I am looking at building a query to determine how much time...

SQL Server Transactional Replication from Always On Availability Groups to Azure SQL Database

By Terry Jago

Comments posted to this topic are about the item SQL Server Transactional Replication from...

Hidden Heroes

By Steve Jones - SSC Editor

Comments posted to this topic are about the item Hidden Heroes

Visit the forum

Question of the Day

Identities and Sequences I

When thinking of the Identity property for auto incrementing columns and sequences for the same action, which are explicitly linked to increment a number in a table when a new row is added?

See possible answers