Archive for the ‘Database Development’ Category
Posted by jpluimers on 2012/11/22
Thanks SQLMenace (Denis Gobo) for this great tip on getting min/max/average row sizes (and more) using DBCC SHOWCONTIG.
Don’t forget the “with tableresults”, without it, it will skip the min/max/average recordsize from the results, and present the results as text (not as a row).
Run DBCC SHOWCONTIG with your table name
dbcc showcontig ('TableName') with tableresults
then look at max min and average record size
This feature works at least from SQL Server 2000 onward, though somewhere after SQL Server 2012 it will be removed.
As of SQL Server 2005 you can use sys.dm_db_index_physical_stats. An example on how to use that is here.
It just made me shiver when finding out an unindexed table with 9 million rows averaging about 300 bytes took 8 minutes to query.
Time to add some indexes, and have someone look at the disk back-end.
–jeroen
via: sql server – Size of a single Record ? SQL – Stack Overflow.
Posted in Database Development, Development, SQL Server, SQL Server 2000, SQL Server 2005, SQL Server 2008, SQL Server 2008 R2, SQL Server 2012 | Leave a Comment »
Posted by jpluimers on 2012/10/16
Being used to do Unit Testing in most of my regular code, I want to do the same for SQL Server code.
Target is SQL Server 2000 and up (since I’m involved in a big migration project getting a lot of SQL Server 2000 data and code to be upgraded to SQL Server 2012 or SQL Server 2008 R2).
Here are a few links that are on my research list:
–jeroen
Posted in Database Development, Development, Software Development, SQL Server, SQL Server 2000, SQL Server 2005, SQL Server 2008, SQL Server 2008 R2, SQL Server 2012 | Leave a Comment »
Posted by jpluimers on 2012/10/11
Never call this encryption, as ROT13 is just a kind of obfuscation for text and can be easily revealed (like the reveal button in good old Teletext).
A few T-SQL versions of this algorithm, both working for SQL Server 2000 and up:
–jeroen
Posted in Database Development, Development, SQL Server, SQL Server 2000, SQL Server 2005, SQL Server 2008, SQL Server 2008 R2, SQL Server 2012 | Leave a Comment »
Posted by jpluimers on 2012/10/09
As a follow-up on my earlier number validation posts (Elf proef in C# and Other number verifications), I found a nice T-SQL version of the Elfproef for Dutch bank account numbers.
It works at least from SQL Server 2000 and up, most likely also in the (unsupported) SQL Server 7.
–jeroen
via: Elfproef als T-SQL UDF.
Posted in .NET, C#, Database Development, Development, Software Development, SQL Server, SQL Server 2000, SQL Server 2005, SQL Server 2008, SQL Server 2008 R2, SQL Server 2012, SQL Server 7 | Leave a Comment »
Posted by jpluimers on 2012/10/08
Nice!:
New utility: PDX Viewer Plus 1.00 beta. A simple Paradox Database Viewer that does not require drivers or an install.
–jeroen
via: Twitter / alexnolannet: New utility: PDX Viewer Plus ….
Posted in Database Development, Delphi, Development, Paradox, Power User, Software Development | Leave a Comment »
Posted by jpluimers on 2012/09/26
Database Workbench is my tool of choice for doing database work: it supports many backends in a consistent manner, and behaves a lot like Delphi (like running and debugging stored procedures).
Yesterday the free Lite Editions of Version 4.3.1 got released:
Database Workbench 4.3.1 free Lite Editions released
This new release of Database Workbench brings new features and enhancements, as requested by our users.
The free Lite Editions are now available.
More information about Database Workbench is available at the Database Workbench page, download your copy today via our downloads page, pricing information is available, the limited Lite Editions are available for free.
Changes in this release
- The full details and list of changes are available here and here.
- New
- MySQL Stored Procedure, Function and Trigger Debugging (Pro Edition only)
- InterBase and Firebird syntax check in Trigger Editor (Pro Edition only)
- Incremental search of data in SQL, Table and View Editor
Changes
- More compact taskbar
- MySQL support for BINARY and VARBINARY datatypes
- MySQL error fixed when not having access to mysql.procs
- MySQL fix for fetching foreign key information
- Data Import and Export fixes
- Windows 7 event log error by SideBySide fixed
And much more…
–jeroen
via News @ Upscene Productions.
Posted in Database Development, Delphi, Development, Firebird, InterBase, MySQL, OracleDB, PostgreSQL, Software Development, SQL, SQL Server, SQL Server 2000, SQL Server 2005, SQL Server 2008, SQL Server 2008 R2, SQL Server 2012, SQL Server 7 | 1 Comment »
Posted by jpluimers on 2012/09/12
Every once in a while I need something like this, and I always forget the best way to do it: pad numbers so they start with leading zeros so they appear fixed with.
The SQLAuthority phrases it:
There is no ready made function in SQL Server which offers this solution but we can quickly write up something very simple.
SQLUSA has some more ways to do it, and all basically come down to this:
- Convert your number to VARCHAR (use CAST or CONVERT) .
- Prepend the converted number with the maximum number of zeros you require (either with a fixed length string like
'00000000', or use the REPLICATE function).
- Take the right most characters of the required length using the RIGHT function.
You can do similar things with LEFT and padding (for instance with spaces to the right).
One example:
SELECT RIGHT('0000000000' + CAST(31415 AS VARCHAR(10)), 10) AS PaddedPiInteger
SELECT LEFT(CAST(31415 AS VARCHAR(10)) + ' ', 10) AS PaddedPiInteger
–jeroen
via SQL SERVER – Pad Ride Side of Number with 0 – Fixed Width Number Display « SQL Server Journey with SQL Authority.
Posted in Database Development, Development, SQL, SQL Server, SQL Server 2000, SQL Server 2005, SQL Server 2008, SQL Server 2012, SQL Server 7 | Leave a Comment »
Posted by jpluimers on 2012/09/05
A very interesting (Dutch) article as PDF written by the Insite Advies people on “testing information systems and the usage of anonymized personal data”:
Artikel in Compact
Insite Advies heeft samen met ITCG (www.itcg.nl) een artikel geschreven met als titel ‘Testen van informatiesystemen en het gebruik van (geanonimiseerde) persoonsgegevens’.
Het artikel verscheen deze week in Compact (www.compact.nl).
Het artikel gaat in op de risico’s van het testen van de juiste werking van informatiesystemen met behulp van bestaande persoonsgegevens en legt uit hoe organisaties ten behoeve van testdoeleinden bestaande persoonsgegevens eenvoudig kunnen anonimiseren.
Download het artikel.
–jeroen
via: Artikel in Compact | Insite.
Posted in Database Development, Development, Software Development, Testing | Leave a Comment »
Posted by jpluimers on 2012/08/28
Dang; I thought this had long left the posting queue, but somehow it ended in the drafts (:
Since then, many more event videos made it to Channel 9, including Build 2011, and TechDays 2012.
Anyway, here it is:
Microsoft’s PDC 2010 was held at the end of October 2010 in Redmond, WA, USA.
For the people that could not attend, it is very nice to view the sessions using the PDC10 player (it seems still people didn’t learn and start stripping the century parts from years again!).
Even if you are not using Visual Studio, .NET Azure or other Microsoft Technologies, there are a lot of interesting sessions showing the directions that Microsoft is taking.
Comparing that to what you do today is always a good thing to do: it helps you reflect, an important part of your personal development.
A few things I found interesting (in no particular order):
- Asynchrony support in C# 5 and VB.NET 11 based on the Task Parallel Library
- The choice to favour HTML 5 over SilverLight, even though Internet Explorer 9 and Microsoft’s HTML 5 authoring/development tools are far from ready
- Azure reporting: is reporting the next big thing on clouds?
- Offline versus online in the cloud world
- NuPack – does it bring package management to the same level as Ruby or *nix?
- XNA for XBox, Windows and Windows Phone
Enjoy!
–jeroen
Posted in .NET, .NET 4.5, C#, C# 4.0, C# 5.0, Channel9, Cloud Development, Database Development, Delphi, Development, HTML, HTML5, Mobile Development, SilverLight, SocialMedia, Software Development, Visual Studio 11, Visual Studio 2010, Visual Studio and tools, Web Development, Windows Azure, Windows Phone Development, XNA | 2 Comments »
The Wiert Corner - irregular stream of stuff 