SQL Server Statistics: Problems and Solutions

SQL Server Statistics assist the query optimiser to calculate the best way of running the query. Holger describes every common way that things can go wrong with statistics, and how to put matters right.

An Overview of Extended Events in SQL Server 2008

In this tip we look at Extended Events for SQL Server 2008 and how they are different from earlier tracing and troubleshooting methods.

Return to Sender: Identity Values and Triggers

By quickly and easily obtaining the identity value, the OUTPUT clause of an INSERT statement can obtain the auto-generated identity value of a row, and so will allow the application to immediately reference the new row or add rows to another table that use the identity value as a foreign key reference.

Retrieving SQL Server Permissions for Disaster Recovery

I'm needing to audit the permissions in my databases, but I want to script them out so I have something to run in case of a recovery situation. I've got the logins, roles, and users handled, but it's the permissions that I want to extract. How can I do this easily?

Under the ORM Hood: Revealing the SQL

Your application code may look neat and clean, and you are using a sound Object-relational Mapper, but when you put the pedal to the metal, you're not getting the performance. The time has come to lift the hood and see what SQL is being generated by the ORM, and what part of your code is causing the bottlenecks. The effect can be spectacular.

Hierarchical Data Structure Virtualization in SQL

Data structure virtualization is the constructing of a data structure utilizing pieces or fragments from other data structures. This article demonstrates how Data structure virtualization can be performed in ANSI SQL utilizing hierarchical processing techniques to produce hierarchically structured virtualized output.

Showplan Operator of the Week – SORT

Fabiano introduces another ShowPlan operator that is used to build a query plan, or perform an operation specified in the DML. Once again, Fabiano demonstrates why it is important to be aware of these operators when getting queries to perform well.

Intelligent Conditional Split in an SSIS Package

Conditional Split is one of the most commonly used transforms in any SSIS Package development routine. The limitation with conditional split is that any record that satisfies the first condition from the conditions list is routed to its corresponding path exclusively. In a logical sense, a record might satisfy more than one condition and one might want the record to be routed to all paths for processing, but with the Conditional Split transform this is not possible. We need a more intelligent conditional split where we can selectively route the records to more than one output path. In this tip we will look at how to facilitate this intelligent conditional split.

Using SSIS Logging to Resolve Runtime Errors and Performance Issues

Runtime errors and performance issues can be difficult to identify and resolve. One of the primary methods that assist with their resolution involves generating logs, which contain records of events taking place during code execution. This article provides a comprehensive overview of logging options available in SQL Server 2008 R2 Integration Services.

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