The Query Optimiser needs a good estimate of the number of rows likely to be returned by each physical operator in order to select the best query plan from the most likely alternatives. Sometimes these estimates can go so wildly wrong as to result in a very slow query. Joe Sack shows how it can happen with SQL Queries on a data warehouse with a star schema.
2012-12-10
1,163 reads
Occasionally, when deploying a database, you need to copy data out to file from all the tables in a database. Phil Factor shows how to do it, and illustrates its use by copying an entire database from one server to another.
2012-12-07
2,690 reads
SQL Server 2012 Integration Services offers a wide range of powerful features that allow you to streamline and automate tasks involving data extraction, transformation, and loading. However, incorporating these features into your existing business intelligence framework frequently necessitates additional security measures ensuring that data which is being processed remains protected from unauthorized access.
2012-12-06
2,106 reads
I have a requirement to add the Log Shipping Monitor for an existing installation. I have heard you can only complete this by rebuilding the Log Shipping infrastructure. Is that true? Are there any other options? In this tip I will explain how we can add the Log Shipping monitor to a SQL Server 2005, 2008, 2008 R2 or 2012 environment without rebuilding the Log Shipping installation.
2012-12-05
2,688 reads
With Report Builder and SSMS, there isn't much you can't do in the way of the common reports and visualisations. One of the more interesting visualisations uses maps, and that, combined with layers, makes for an impressive way of representing data.
2012-12-04
3,269 reads
I have to support a third party application that periodically creates a new database on the fly. This obviously causes issues with our backup mechanisms. The databases have a particular pattern for naming, so I can identify the set of databases, however, I need to make sure I'm always backing up the newest one. Read this tip to ensure you are backing up your latest database in a series.
2012-12-03
2,037 reads
My organization is looking at SQL Server 2012 and I know that the ability to create roles at the server level is a new feature. Since this is new and impacts security, how do I handle them and how do I audit them?
2012-11-30
2,255 reads
Quite often, the database developer or tester is faced with having to load data into a newly created database. What could be simpler? Quite a lot of things, it seems.
2012-11-29
2,610 reads
I have a busy SQL Server and notice that several queries are running in parallel. I know I can set the max degree of parallelism setting, but what MAXDOP should I use?
2012-11-28
4,230 reads
SQL Server 2012 introduced an unified BI Semantic Model (BISM) which is based on some of the existing as well as some new technologies. This model is intended to serve as one model for all end user experiences for reporting, analytics, scorecards, dashboards, etc. In this tip, I will talk in detail about the new BISM, how it differs from earlier the earlier Unified Dimensional Model (UDM) and how BISM lays down a foundation for future.
2012-11-27
3,420 reads
By Brian Kelley
A few months ago I started using Deepstash. Deepstash breaks books into the key...
By Brian Kelley
Do you have a case where you have a named instance you'd like to...
I’ve been running this blog on Hugo for a long time, and like most...
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Which of these RegEx functions need compatibility level 170 in SQL Server 2025?
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