TechEd Bloggers Database Platform

If Timestamp is Deprecated, Why do None of the Current db Tools Support Rowversion

Julie Lerman — Thu, 11 Mar 2010 21:37:24 GMT

Julie Lerman writes, "...If you were to look up the timestamp data type in the SQL Server 2008 documentation, this is waht you will find within the topic article: “The timestamp syntax is deprecated. This feature will be removed in a future version of Microsoft SQL Server...Yet, I care a lot about this because I use timestamp fields in the sample database for..." more

Thu, 11 Mar 2010 21:37:24 GMT

Sample Ad-Hoc String Concatenation Using LINQ

Eric White — Wed, 10 Mar 2010 18:56:27 GMT

Eric White writes, "When writing example code or tools, I use the StringConcatenation extension method...I keep this method in the PtUtil.cs module...But when I’m writing an ad-hoc query, sometimes it’s not worth the effort to put that source file in my project...When I don’t need to interject a new line between each string, I use the Aggregate extension method as follows..." more

Wed, 10 Mar 2010 18:56:27 GMT

Code Sample Serializing Encoded XML Documents Using LINQ to XML

Eric White — Tue, 09 Mar 2010 23:28:47 GMT

Eric White writes, "...The following example serializes the document as utf-8. Setting the encoding property of the XDeclaration (set through the second parameter of the constructor) specifies the encoding of the serialized XML...So, you can see that you can specify your desired encoding, and if the stream to which you are serializing supports that encoding, you will get what you want, but..." more

Tue, 09 Mar 2010 23:28:47 GMT

In SQL What SPN You Use and How it Gets There

PSS SQL Engineers — Tue, 09 Mar 2010 19:38:48 GMT

PSS SQL Engineers writes, "...regarding SPN’s for SQL Server and what we can do to get them created and in a usable state...if the SQL Service account is using Local System or Network Service as the logon account, we will have the permission necessary to register the SPN against the Domain Machine Account. By default, the machine accounts have permission to modify themselves. If we change this..." more

Tue, 09 Mar 2010 19:38:48 GMT

Not Happy About the RDLOM Story?

Teo Lachev — Tue, 09 Mar 2010 19:25:02 GMT

Teo Lachev writes, "...One R2 change that really vexes me is RDLOM...short for Report Definition Language Object Model, lets developers program RDL in object-oriented way as opposed to using XML. RDLOM could save you a lot of effort when you have to meet more advanced requirements that involve pre-processing RDL. For example..The RDLOM R2 C# console application bundled in this code sample demonstrates how you can use the "new" RDLOM..." more

Tue, 09 Mar 2010 19:25:02 GMT

How to Enable Partition Level Locking in SQL Server 2008

SQLCAT Team — Fri, 05 Mar 2010 00:38:20 GMT

SQLCAT Team writes, "...well-hidden feature in SQL Server 2008 – partition-level locking...Lock escalation can sometimes cause blocking or deadlock situations – so it is feature that DBAs should be aware of. You can trace lock escalation SQL Server 2008, you get a new option: disabling lock escalation at the table level using the command:..." more

Fri, 05 Mar 2010 00:38:20 GMT

Does SQL Server Compact Edition 3.5 in VS2010 RC Have Geometry Types?

Albert Pascual — Wed, 03 Mar 2010 16:39:53 GMT

Albert Pascual writes, "...I don’t know if in the geometry and geography types will be supported in release version of the SQL Server Compact Edition, seems difficult if the release candidate does not. This is a huge problem for people that uses those kinds of types in their database to migrate. In my modest opinion new releases of SQL Server should always be..." more

Wed, 03 Mar 2010 16:39:53 GMT

Three Performance tips Using XML Data in SQL Server

SQLCAT Team — Tue, 02 Mar 2010 19:47:35 GMT

SQLCAT Team writes, "...Here are 3 quick tips from query performance perspective based on real customer experience. 1. Promoting key XML attribute/property to relational column...2. Typed or Untyped XML data?...3. What XML indexes to add?..." more

Tue, 02 Mar 2010 19:47:35 GMT

Running Reporting Services Reports in Windows Azure

Darryl Schaffer — Wed, 24 Feb 2010 22:10:52 GMT

Darryl Schaffer writes, "...how to run a SQL Server Reporting Services 2008 report in Windows Azure using the ReportViewer control that ships with Visual Studio 2010. As an added bonus, I demonstrate using ReportViewer against an OData service through the use of WCF Data Services client libraries and the ObjectDataSource..." more

Wed, 24 Feb 2010 22:10:52 GMT

Building a Database That Will Outlive the Programming Environment

Frans Bouma — Wed, 24 Feb 2010 17:52:43 GMT

Frans Bouma writes, "...the point of using a relational model: you store data in a model which gives it meaning in a general form, so you can create new information from it by using relational algebra, in such a way that it doesn't matter what query you might need in the future, it's already suitable for dealing with that...many databases outlive the software they're initially created for, it's important to realize..." more

Wed, 24 Feb 2010 17:52:43 GMT

How It Works: SQL Server 2008 NUMA and Foreign Pages

PSS SQL Engineers — Tue, 23 Feb 2010 18:30:37 GMT

PSS SQL Engineers writes, "The following is an example of a 2-physical node NUMA system. During the initial state the buffer pool is growing towards the commit target. SQL Server commits memory and sorts it during this state...If the memory is from a remote node it is added..." more

Tue, 23 Feb 2010 18:30:37 GMT

Fix for Error: Subqueries are not allowed in this Context

Sumedha Rubasinghe — Tue, 23 Feb 2010 17:55:08 GMT

Sumedha Rubasinghe writes, "...error is caused by using a wrong subquery syntax on SQLs sent to MSSQL server...For example let's assume you have a SQL similar to following:" more

Tue, 23 Feb 2010 17:55:08 GMT

Code Showing EF4 Include Method Returns Different Results than EF1 Include

Julie Lerman — Thu, 18 Feb 2010 19:07:19 GMT

Julie Lerman writes, "...Here is a model with the same set up : a many-to-many relationship between Person & Brewery defined using a join entity (FavoriteBrewery) and Brewery has a one-to-many relationship with Beer...This is definitely different than what we have learned to expect from querying...It’s a breaking change that, because it’s an edge case..." more

Thu, 18 Feb 2010 19:07:19 GMT

Right Track or Not? Entity Framework Lazy Loading by Context or Property

Julie Lerman — Wed, 17 Feb 2010 20:10:44 GMT

Julie Lerman writes, "...I was thinking about this today and realized that EF does, in fact, support property level lazy loading.There are three essential types of entities in EF4...The POCOs that use dynamic proxies can do so only when every single property is marked virtual...Simple POCOs that do not use dynamic proxies can still benefit from lazy loading. As long as the relationship property is marked virtual and..." more

Wed, 17 Feb 2010 20:10:44 GMT

Small Change in EF Loading Behavior from VS2008

Julie Lerman — Tue, 16 Feb 2010 19:23:47 GMT

Julie Lerman writes, "...In .NET 3.5 you cannot Load an EntityReference for an Added entity even when the entity has the critical piece of information -- the EntityReference.EntityKey of the item to be loaded. It will fail with an exception. In .NET 4, it works. You can set the foreign key property or the..." more

Tue, 16 Feb 2010 19:23:47 GMT

Beware Self-Tracking Entities Conflict with EF CTP & VS2010 RC

Julie Lerman — Thu, 11 Feb 2010 20:53:32 GMT

Julie Lerman writes, "...If you install the EF Feature CTP on top of the VS2010 RC, you will overwrite the Self Tracking Entities template with the old version and it will no longer work.and then copy the RC zip files over the ones which the CTP installed. That didn’t work out very well. Option 1..." more

Thu, 11 Feb 2010 20:53:32 GMT

RIA Services in VS2010 B2 Debug Error Caused by Intellitrace

Julie Lerman — Wed, 10 Feb 2010 20:11:04 GMT

Julie Lerman writes, "...I had a problem that stopped me in my tracks for two days. A RIA Services/Silverlight solution which I had created from the Silverlight Business App solution template, was crashing...in the end it turned out that the cause of my problem was a known issue with VS2010’s Intellitrace...but it was not documented anywhere discoverable..." more

Wed, 10 Feb 2010 20:11:04 GMT

SQL Code and Stepts Shredding XML into HIERARCHYID

Peter DeBetta — Tue, 09 Feb 2010 19:34:15 GMT

Peter DeBetta writes, "...I had discussed a method of shredding XML to a table with HIERARCHYID, and realized that it had a dependency that I was not too keen about: The XML data required an “id” attribute in order to create the hierarchy...I can generate unique paths to be parsed into a HIERARCHYID column..." more

Tue, 09 Feb 2010 19:34:15 GMT

Why SQL Partition Merge is Slow

SQL Storage Engine Team — Thu, 04 Feb 2010 17:32:51 GMT

SQL Storage Engine Team writes, "...There is a workaround for this when the partitions to be merged are mapped to the same filegroup. In the example above where the intention is to drop a partition it is clear that the destination partition is always empty. The workaround is to..." more

Thu, 04 Feb 2010 17:32:51 GMT

SQL Sample Code on How to Select All Multi-Value Cascading Parameter

PSS SQL Engineers — Tue, 02 Feb 2010 23:52:24 GMT

PSS SQL Engineers writes, "...The example report I’ll be using will make use of the AdventureWorksDW sample database. I will also be using SQL 2008 R2 November Release, but the same will apply to SQL 2008 Reporting Services as well. In my report, I have three multi-value parameters. Each one dependent on the parameter before it (cascading parameters). The parameters are Category, Subcategory and Product, in that order..." more

Tue, 02 Feb 2010 23:52:24 GMT