Additional Articles

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External Article

SQL Server Foreign Key Update and Delete Rules

Foreign key constraints are an integral part of SQL Server database design. These are used to maintain integrity among related data in different tables. While implementing update and delete operations on values in the parent table (referenced table with primary key) we have to consider the impact on related values in the child table. SQL Server provides different rules for managing the effect of updates and deletes on child table values. How can these rules be used effectively without threatening the relational integrity?

2011-05-03

4,940 reads

External Article

Performing DBCC Checks Using SQL Virtual Restore

Ever restored a corrupted database from the backup, only to find that the backups are corrupted too - All the backups? Sure it can happen and it isn't nice when it does. To check that a database backup is internally consistent you have to use DBCC CheckDB. On a huge highly-loaded live system? Grant Fritchey has, as usual, a practical solution.

2011-05-02

3,896 reads

External Article

SSIS Event Handlers Basics

SSIS event handlers are the simplest means of turning an SSIS script into a reliable system that is auditable, reacts appropriately to error conditions, reports progress and allows instrumentation and monitoring your SSIS packages. They are easy to implement, and provide a great deal of flexibility. Rob Sheldon once again provides the easy, clear introduction.

2011-04-29

4,017 reads

External Article

Check your Digits

The most persistent struggle in data processing has been to ensure clean data. There are many ways that data can be incorrect and a database must check, as best it can, that the data is correct. The CHECK constraint is ideally suited for this sort of work, and the checking routine can become quite complex when dealing with check digits in data.

2011-04-28

3,328 reads

External Article

Backup and Restore of an Analysis Services Database

One of the most important responsibilities of a database administrator is to make sure that all the databases are backed up across environments managed by them. In my earlier article titled Importance of Database Backups and Recovery Plan I discussed the importance of a good database backup and recovery plan for all the user and system databases. In this article we will take a look at the steps which a database administrator needs to follow to backup and restore an analysis services database.

2011-04-25

3,172 reads

Technical Article

When does a Tumbling Window Start in StreamInsight

Whilst getting some courseware ready I was playing around writing some code and I decided to very simply show when a window starts and ends based on you asking for a TumblingWindow of n time units in StreamInsight. I thought this was going to be a two second thing but what I found was something I haven’t yet found documented anywhere until now.

2011-04-21

2,346 reads

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Question of the Day

A Quick Restore

While doing some testing of an application, I wanted to reset my environment after doing some testing with this code: 

USE DNRTest

BACKUP DATABASE DNRTest TO DISK = 'dnrtest.bak'
GO
/*
Bunch of stuff tested here
*/RESTORE DATABASE DNRTest FROM DISK = 'dnrtest.bak' WITH REPLACE
What happens if this runs, assuming the "bunch of stuff" isn't anything affecting the instance.

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