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Posted by jpluimers on 2012/11/29
Great post: SQL Server: JOIN vs IN vs EXISTS – the logical difference.
Be aware of the three valued logic when NULL gets involved.
EXIST comes closes to what you expect.
And be aware that with IN, you cannod pass one parameter containing more than 1 IN value: sql server 2005 – Passing multiple values for one SQL parameter – Stack Overflow..
–jeroen
Posted in Database Development, Development, SQL, 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 2012/11/27
I could only find the System Error Messages overview for:
Are there any such links for SQL Server 2005 and up?
The odd thing is online lists of Database Engine Error Severities are available for multiple versions of SQL Server: 2005, 2008 and 2008 R2.
–jeroen
Posted in Database Development, Development, 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 2012/11/22
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 tableresultsthen 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 2012/09/26
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.
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:
'00000000', or use the REPLICATE 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
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 2012/08/21
Few people know about the INFORMATION_SCHEMA views that have been there since SQL-92.
Two funny things about that standard:
A few reasons I can imagine not many people know about the INFORMATION_SCHEMA:
I remember the Y2K preparation era where the ISO-8601 standard was freely available at http://www.iso.ch/markete/8601.pdf, soon after the Year 2000, the PDF got locked behind a payment engine.
ISO suffers from heavy link rot too, for instance the ISO 3166 country codes used to be at http://www.iso.org/iso/prods-services/iso3166ma, but are now at http://www.iso.org/iso/home/standards/country_codes.htm. What about HTTP 303 or 302 redirect here guys?
Since SQL-92, the INFORMATION_SCHEMA (and its twin DEFINITION_SCHEMA) have been extended. The last extension in 2008. Together they allow SQL databases to be self-describing (I think no vendor has attained that) and the structures queryable in a standard way
In fact that is the main purpose: these views in INFORMATION_SCHEMA are a very convenient standard way to query – in a vendor agnostic way – about tables, views, columns, etc. Read the rest of this entry »
Posted in Database Development, Development, Firebird, InterBase, ISO 8601, MySQL, OracleDB, PostgreSQL, Power User, SQL, SQL Server, SQL Server 2000, SQL Server 2005, SQL Server 2008, SQL Server 2008 R2, SQL Server 2012, SQL Server 7, Sybase | Leave a Comment »
Posted by jpluimers on 2012/08/15
A few weeks ago, Bill Karwin did a must watch webinar on the prevention SQL Injection titled “SQL Injection Myths and Fallacies“.
Bill Karwin (twitter, new blog, old blog, Amazon) is famous for much work in the SQL database community, including InterBase/Firebird, mySQL, Oracle and many more.
He also:
Anyway, his webinar is awesome. Be sure to get the slides, watch the replay, and read the questions follow up.
Watching it you’ll get a better understanding of defending against SQL injection.
A few very valuable points he made: Read the rest of this entry »
Posted in .NET, .NET 3.5, .NET 4.5, .NET ORM, ASP.NET, Batch-Files, C#, C# 1.0, C# 2.0, C# 3.0, C# 4.0, C# 5.0, C++, Cloud Development, COBOL, CommandLine, Database Development, Delphi, Delphi for PHP, Delphi x64, Delphi XE2, Development, EF Entity Framework, F#, Firebird, FireMonkey, History, InterBase, iSeries, Java, JavaScript/ECMAScript, Jet OLE DB, LINQ, LLBLGen, MEF, Microsoft Surface, Mobile Development, PHP, PowerShell, Prism, Scripting, SharePoint, SilverLight, Software Development, SQL, SQL Server, SQL Server 2000, SQL Server 2005, SQL Server 2008, SQL Server 2008 R2, SQL Server 2012, SQL Server 7, VB.NET, VBS, Visual Studio 11, Visual Studio 2002, Visual Studio 2003, Visual Studio 2005, Visual Studio 2008, Visual Studio 2010, Visual Studio and tools, Web Development, Windows Azure, WinForms, WPF, XAML, xCode/Mac/iPad/iPhone/iOS/cocoa | 1 Comment »
The Wiert Corner - irregular stream of stuff 