Migrating SQL Server Databases - The DBA's Checklist (Part 1)
Migrating a database is often a task fraught with complications, this series examines the key issues in a simple checklist.
2009-09-16
3,369 reads
Additional Articles
Introduction to Dimension Security in SQL Server Analysis Services SSAS 2005
I have seen the tip Dynamically Control Data Filtering in SQL Server Reporting Services Reports which showed how to leverage a SQL Server database table to filter sales data based on the user running the report. I have a similar requirement to implement dynamic filtering except my data is in a SQL Server Analysis Services (SSAS) cube and the users query the data with a variety of different tools. How can I implement dynamic security in my case?
2009-09-15
2,770 reads
Tuning the Performance of Change Data Capture in SQL Server 2008
Change data capture is a new feature in SQL Server 2008 that provides an easy way to capture changes to data in a set of database tables so these changes can be transferred to a second system like a data warehouse. This document provides guidance on how to configure change data capture parameters to maximize data capture performance while minimizing the performance impact on the production workload. The scope of this document is limited to the capture of change data and the cleanup process. Querying the changed data is out of scope for this white paper.
2009-09-15
2,531 reads
Disaster Recovery for SQL Server Databases
High-Availability depends on how quickly you can recover a production system after an incident that has caused a failure. This requires planning, and documentation. If you get a Disaster Recovery Plan wrong, it can make an incident into a catastrophe for the business. Hugo Shebbeare discusses some essentials, describes a typical system, and provides sample documentation.
2009-09-14
4,158 reads
Service Broker: Performance and Scalability Techniques
SQL Server Service Broker provides support for building asynchronous messaging and queuing applications with the SQL Server Database Engine. This paper describes a large scale customer scenario and the techniques employed in scaling Service Broker to process tens of thousands of messages per second on one server.
2009-09-11
2,807 reads
Ten Common SQL Programming Mistakes
It is not always easy to spot "antipatterns" in your SQL, especially in more complex queries. In this article, Plamen demonstrates some of the most common SQL coding errors that he encounters, explains their root cause, and illustrates potential solutions.
2009-09-11
8,634 reads
Understanding Scans And Seeks
Whether a query uses Scan or Seek can have a big impact on the cost of excuting that query. This article examines when each is used and which is optimal.
2009-09-10
6,054 reads
Using Star Join and Few-Outer-Row Optimizations to Improve Data Warehousing Queries
In this white paper we discuss two of the new features in SQL Server 2008, Star Join and Few-Outer-Row optimizations. We test the performance of SQL Server 2008 on a set of complex data warehouse queries designed to highlight the effect of these two features and observed a significant performance gain over SQL Server 2005 (without these two features).
2009-09-10
4,815 reads
EVA Partition Alignment
Partition alignment is a well documented best practice, but does it have any benefit on an HP EVA?
2009-09-09
2,968 reads
Transact-SQL Formatting Standards
How should SQL code be formatted? What sort of indentation should you use? Should keywords be in upper case? How should lists be lined up? SQL is one of those languages that will execute however you treat whitespace and capitalization. However, the way SQL is laid out will effect its readability and the time taken to review and understand it. Standardisation of code layout is an important issue, but what standard should you adopt? Rob avoids a direct answer, but tells you the sort of answers you'll need to decide upon when creating a strategy for formatting SQL code.
2009-09-09
4,890 reads
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Question of the Day
Using OPENJSON
I have some data in a table that looks like this:
BeerID BeerName brewer beerdescription 1 Becks Interbrew Beck's is a German-style pilsner beer 2 Fat Tire New Belgium Toasty malt, gentle sweetness, flash of fresh hop bitterness. 3 Mac n Jacks Mac & Jack's Brewery This beer erupts with a floral, hoppy taste 4 Alaskan Amber Alaskan Brewing Alaskan Brewing Amber Ale is an "alt" style beer 8 Kirin Kirin Brewing Kirin Ichiban is a Lager-type beerIf I run this, what is returned?
select t1.[key]
from openjson((select t.* FROM Beer AS t for json path)) t1 See possible answers