Microsoft SQL Server 2008 Internals in VB.NET

Generator UPC-A Supplement 2 in VB.NET Microsoft SQL Server 2008 Internals

Microsoft SQL Server 2008 Internals
UPC Symbol Creation In Visual Basic .NET
Using Barcode generator for .NET Control to generate, create UPC-A Supplement 2 image in .NET applications.
www.OnBarcode.com
GS1 - 12 Recognizer In Visual Basic .NET
Using Barcode scanner for .NET Control to read, scan read, scan image in .NET applications.
www.OnBarcode.com
This query converts the ring buffer data to an XML instance and then uses the nodes XML function to create one row per event node found. It then uses the ordinal positions of the various data elements within the event nodes to map the data to output columns. Of course, more advanced sessions require more advanced XQuery to determine the type of each event and do some case logic if the events involved in the session have different schemas which, thankfully, the two in this example do not. Once you ve gotten to this point, the data is just that standard tabular data, which can be aggregated, joined, inserted into a table, or whatever else you want to do with it. You can also read from the asynchronous le target via T-SQL, using the sys.fn_xe_ le_target_ read_ le table-valued function. This function returns one row per event, but you still have to get comfortable with XML; the event s data, exposed in a column called event_data, is in an XML format similar to data in the ring buffer target. Eventually we can expect a user interface to bear some of the XML burden for us, but just as with SQL Trace, even the most powerful user interfaces aren t enough when complex analysis is required. Therefore, XML is here to stay for those DBAs who wish to be XE power users.
Encoding Bar Code In Visual Basic .NET
Using Barcode generation for VS .NET Control to generate, create barcode image in Visual Studio .NET applications.
www.OnBarcode.com
Reading Bar Code In Visual Basic .NET
Using Barcode reader for VS .NET Control to read, scan read, scan image in VS .NET applications.
www.OnBarcode.com
Stopping and Removing the Event Session
Creating UPC-A Supplement 5 In C#
Using Barcode generator for VS .NET Control to generate, create UCC - 12 image in .NET framework applications.
www.OnBarcode.com
UCC - 12 Creator In VS .NET
Using Barcode printer for ASP.NET Control to generate, create UPCA image in ASP.NET applications.
www.OnBarcode.com
Once you have nished reading data from the event session, it can be stopped using the following code:
Drawing UCC - 12 In Visual Studio .NET
Using Barcode printer for .NET Control to generate, create GTIN - 12 image in .NET applications.
www.OnBarcode.com
Barcode Printer In Visual Basic .NET
Using Barcode drawer for Visual Studio .NET Control to generate, create barcode image in .NET framework applications.
www.OnBarcode.com
ALTER EVENT SESSION [statement_completed] ON SERVER STATE=STOP;
Making EAN13 In Visual Basic .NET
Using Barcode generation for .NET framework Control to generate, create EAN 13 image in .NET applications.
www.OnBarcode.com
Create EAN 128 In Visual Basic .NET
Using Barcode drawer for .NET framework Control to generate, create USS-128 image in Visual Studio .NET applications.
www.OnBarcode.com
Stopping the event session does not remove the metadata; to eliminate the session from the server completely, you must drop it using the following statement:
USS Code 128 Creator In VB.NET
Using Barcode encoder for .NET Control to generate, create USS Code 128 image in .NET applications.
www.OnBarcode.com
Code 11 Creation In VB.NET
Using Barcode encoder for .NET framework Control to generate, create USD8 image in .NET framework applications.
www.OnBarcode.com
ALTER EVENT SESSION [statement_completed] ON SERVER;
Code 39 Decoder In Java
Using Barcode reader for Java Control to read, scan read, scan image in Java applications.
www.OnBarcode.com
Barcode Reader In Visual C#
Using Barcode Control SDK for .NET framework Control to generate, create, read, scan barcode image in VS .NET applications.
www.OnBarcode.com
Summary
PDF 417 Creation In Java
Using Barcode creation for BIRT Control to generate, create PDF 417 image in BIRT applications.
www.OnBarcode.com
Data Matrix Creator In Objective-C
Using Barcode generator for iPad Control to generate, create Data Matrix image in iPad applications.
www.OnBarcode.com
SQL Server has many eventing systems that range from the simple like triggers and event noti cations to the intricate like XE. Each of these systems is designed to help both users and SQL Server itself work better by enabling arbitrary code execution or data collection when speci c actions occur in the database engine. In this chapter, we explored the various hidden and internal objects used by Change Tracking to help support synchronization applications, the inner workings of the ubiquitous SQL Trace infrastructure, and the complex architecture of XE, the future of eventing within SQL Server. Events within SQL Server are extremely powerful, and we hope that this chapter has provided you with enough internal knowledge of these systems to understand how to better use the many eventing features in your day-to-day activities.
European Article Number 13 Drawer In Java
Using Barcode maker for Java Control to generate, create EAN-13 image in Java applications.
www.OnBarcode.com
GS1 - 13 Decoder In None
Using Barcode recognizer for Software Control to read, scan read, scan image in Software applications.
www.OnBarcode.com
3
Denso QR Bar Code Printer In None
Using Barcode encoder for Font Control to generate, create QR Code ISO/IEC18004 image in Font applications.
www.OnBarcode.com
Linear Drawer In Java
Using Barcode maker for Java Control to generate, create Linear 1D Barcode image in Java applications.
www.OnBarcode.com
Databases and Database Files
Kalen Delaney
Simply put, a Microsoft SQL Server database is a collection of objects that hold and manipulate data. A typical SQL Server instance has only a handful of databases, but it s not unusual for a single instance to contain several dozen databases. The technical limit for one SQL Server instance is 32,767 databases. But practically speaking, this limit would never be reached. To elaborate a bit, you can think of a SQL Server database as having the following properties and features:
It is a collection of many objects, such as tables, views, stored procedures, and constraints. The technical limit is 231 1 (more than 2 billion) objects. The number of objects typically ranges from hundreds to tens of thousands . It is owned by a single SQL Server login account. It maintains its own set of user accounts, roles, schemas, and security. It has its own set of system tables to hold the database catalog. It is the primary unit of recovery and maintains logical consistency among objects within it. (For example, primary and foreign key relationships always refer to other tables within the same database, not in other databases.) It has its own transaction log and manages its own transactions. It can span multiple disk drives and operating system les. It can range in size from 2 MB to a technical limit of 524,272 terabytes. It can grow and shrink, either automatically or manually. It can have objects joined in queries with objects from other databases in the same SQL Server instance or on linked servers. It can have speci c properties enabled or disabled. (For example, you can set a database to be read-only or to be a source of published data in replication.)
And here is what a SQL Server database is not:
It is not synonymous with an entire SQL Server instance. It is not a single SQL Server table. It is not a speci c operating system le.
Copyright © OnBarcode.com . All rights reserved.