What's new in SQL 2008 Part 2
September 7, 2007
This article will highlight some of the new features and benefits found in SQL Server 2008. Some of the new features include Development changes, new Business Intelligence features, Integration additions, and new Data Types. Listed below are some of the items covered that were covered in Part 1 of this series.
SQL Server 2008 will be released approximately February of 2008, along with a new version of Visual Studio and Windows. A CTP (Community Technology Preview) of SQL 2008 is currently available for download from the Microsoft URL http://www.microsoft.com/sql/prodinfo/futureversion/default.mspx.
SQL 2008 leverages the new Dot Net Framework 3.0 with LINQ (Language Integrated Query). In addition, there is more efficient support for Business Data Entities along with data synchronization options. Also, there are new ADO and Visual Studio development options. Collectively, these are labeled Dynamic Development and are reviewed below.
Entity Data Services
SQL Server 2008 and ADO.NET now allow for high level business objects to be created, such as Customers or Parts. These entities can be used rather than the standard method of returning individual rows and tables. If youre using E-R (entity relationship) modeling, your objects in SQL will now match your modeling. There are several new ADO.NET frameworks that can access these entities such as the Line-of-Business (LOB) framework and the Entity Query Language (eSQL).
LINQ provides a standard development syntax for accessing data, regardless of where the data resides. For example, the same syntax can access either SQL Server or XML data. LINQ is used rather than TSQL inside the application language, such as C# or VB.
Data Synchronizing Features
The combination of SQL 2008, Visual Studio, and ADO.NET bring together new methods of creating synchronizing or frequently disconnected applications, making it easier to create client applications that synchronize with a central database. SQL 2005 started by providing support for change tracking by using triggers. SQL 2008 synchronizing is better integrated and optimized.
Beyond Relational Databases
These next groups of features are collectively grouped as Beyond Relational. They include new location, geometry, data and time data types. In addition, there are new Full Text and File Stream options built into SQL Server 2008.
Previously, in SQL 2005, User Defined Types (UDT) could not be larger than 8,000 bytes. In SQL 2008 there is no longer any size restriction, allowing storage of very large UDTs.
Dates and Times
There are new Date and Time data types in SQL 2008.
The new data type VarBinary(Max) FileStream allows for a way to manipulate binary data using TSQL Select, Insert, Update, and Delete statements. In the past, to store binary data a BLOB, accessed by a Dot.Net application was typically used. Now, SQL functions such as triggers, Full Text Search, and backup restore can be applied to binary data.
The new Spatial Data type allows Latitude, Longitude, and GPS-based data entries to be natively stored inside SQL Server. The data type conforms to several industry standards such as Open Geospatial Consortium (OGC) Simple Features for SQL and ISO 19125 Simple Feature Access.
Table Value Parameters
In previous versions of SQL Server, there wasnt a native way to pass a table to a stored procedure. The usual workaround was to pass a large varchar or XML type and parse through it. Now, in SQL Server 2008, Table Parameters are available. The following provides a simple example of passing a table into a Stored Procedure.
CREATE TYPE PartType AS Table (PartID varchar(50), Descr varchar(100), createdate datetime); CREATE PROCEDURE AddPart(@PartList PartType READONLY) AS SELECT * FROM @PartList DECLARE @PartTable PartType; INSERT INTO @PartTable values('Part1', N'Table Test', '2007-08-20'); EXEC AddPart @PartTable
Full Text Search
There are Full Text Search changes in SQL Server 2008 including native indexes, thesaurus files stored as metadata, and the ability to perform a Backup.
Memory management in SQL Server 2008 Reporting Service is improved. So running large reports will not consume all available memory. In addition, report rendering has more consistency than before.
SQL 2000 Support Ends
As explained in Part 1 of this series, Mainstream Support for SQL 2000 is coming to an end in April 2008. This includes the CE version.
SQL Server 2008 has many practical and useful improvements. The new Date and Time data types will help simplify some applications. Listed below is a summary of the features and improvements reviewed so far:
In Part 3 of this series, well cover the following SQL Server 2008 topics: