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Microsoft and Database Lifecycle Management (DLM): The DacPac

The Data-Tier Application Package (DacPac), together with the Data-Tier Application Framework (DacFx), provides an alternative way to automate the process of scripting out, or deploying a SQL Server database, reporting on changes, or checking version-drift. As such, it seems to provide an obvious cost-free start for tackling automated Database Delivery as part of Database Lifecycle Management (DLM). We asked Phil Factor if it is ready for Prime-time.

2015-08-05

5,584 reads

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Demystifying Oracle's Clustering Factor

One of the more confusing statistics in Oracle is one called the clustering factor. Associated with an index, it's actually dependent on the table data, more specifically the distance between 'jumps' for a given index key. Commonly, a 'jump' is the number of blocks between rows containing the given index key starting with the first block found containing that key. If that sounds confusing don't despair, David Fitzjarrell explains in detail.

2015-07-29

3,764 reads

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The Importance of Maintenance on MSDB

MSDB is a system database used by SQL Server. MSDB stores all sorts of data, such as backup history, log shipping monitor history, SSIS packages and Service Broker queue data to name a few. Just like user databases, MSDB needs regular maintenance, including index optimizations and, more importantly, regular purging. In this article, Tim Radney looks at how neglecting your MSDB can negatively impact on your environment.

2015-07-28

6,714 reads

External Article

SQL Style Habits: Attack of the Skeuomorphs

Although we like to think that our programming techniques are progressive and in tune with the bleeding edge of software development practices, too often they are directly influenced by restrictions faced when computers first became mainstream in the post-war decades. In this article Joe Celko looks at the history of mainframes, FORTRAN I and COBOL.

2015-07-24

5,006 reads

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Question of the Day

BIT_COUNT I

In SQL Server 2025, I have a table (dbo.UserPermission) that contains this data: 

UserID  UserPermissions
15
23
37
What is returned when I run this code: 
select bit_count(UserPermissions) as PermissionCount
from dbo.UserPermission
where UserID = 3;

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