Articles

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

SQL Diag Configuration Tool

SQL Diag is a very useful diagnostic tool that will help capture performance information from SQL Server. This tool is shipped with the SQL Server product. Howerver there is not an easy way to configure the tool - it requires the hand editing of an XML file, which is tedious and error prone. That is until now!
SQL Diag Configuration Tool (SDCT) is an intuitive, easy to use tool that will read existing sqldiag.xml configuration files, allow you to select your desired options and save those options to a new file.

2011-04-29

3,589 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

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PostgreSQL String Functions Part 1

By Shivayan Mukherjee

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Working Better Under Pressure

By Steve Jones - SSC Editor

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Identities and Sequences V

By Steve Jones - SSC Editor

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Question of the Day

Identities and Sequences V

When thinking about the identity property and sequence objects, which of these can generate values before an insert statement is executed?

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