It also contains XPath 2.
The XQuery specification currently contains syntax and semantics for querying, but not for modifying XML documents. Each of these are used within the modify method of the XML data type. Service Broker is a distributed application framework that provides reliable asynchronous messaging at the database to database level. Over the last 10 years, the proliferation of e-commerce applications has created a need for increased workflow management across database applications.
When an online customer places an order for a book, this order needs to commit transactions into the inventory, shipping, and credit card systems, and also needs to send an order confirmation using another Web application. Waiting for each of these processes to happen in order doesn't scale well.
SQL Server provides a new scalable architecture for building asynchronous message routing. The Service Broker technology allows internal or external processes to send and receive streams of reliable, asynchronous messages by using extensions to normal Transact-SQL data manipulation language. Messages are sent to a queue in the same database as the sender, to another database in the same instance of SQL Server, or to another instance of SQL Server either on the same server or on a remote server.
SQL Server Reporting Services expands the Microsoft business intelligence vision by making it easy to get the right information to the right people, in any business environment. Reporting Services is a complete, server-based platform for creating, managing, and delivering traditional and interactive reports. It includes everything you need "out of the box" to create, distribute, and manage reports. At the same time, the modular design and the extensive application programming interfaces APIs of Routing Services enable software developers, data providers, and enterprises to integrate reporting with legacy systems or third party applications.
Reporting Services ships with SQL Server and includes: A complete set of tools for creating, managing, and viewing reports. An engine for hosting and processing reports. An extensible architecture and open interfaces for embedding reports or integrating the solution in diverse IT environments.
Notification Services Microsoft SQL Server Notification Services is a platform for developing and deploying applications that generate and send notifications to users. Notifications are personalized, timely messages that can be sent to a wide variety of devices. Notifications reflect the preferences of the subscriber. The subscriber enters a subscription to express an interest in information. A notification can be generated and sent to the user as soon as a triggering event occurs, or can be generated and sent on a predetermined schedule that the user specifies.
The user's subscription specifies when the notification should be generated and sent. Notifications can be sent to a wide variety of devices. For example, a notification can be sent to a user's mobile phone, personal digital assistant PDA , Microsoft Windows Messenger, or e-mail account. Because these devices often accompany the user, notifications are ideal for sending high-priority information.
You can also manipulate the schema of the SQL Server Mobile Edition database directly from Management Studio, regardless of whether the database resides on the mobile device or on the desktop. For the first time, you can control the optimization plan on a device. It also allows binding to data objects that are on devices. You can code an application to synchronize data while leaving the main application open, and you can have two separate applications access the same database on the device at the same time. You can get notifications that you can code into status bars that will give the status of a synchronization.
Previously, there was no way to know how far synchronization status was, to notify users that a device had not stopped responding. You can maintain the small size of the database through a much more aggressive page reclamation policy.
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You can share parameterized query code with SQL Server syntax. These enhancements include error handling, new recursive query capabilities, and support for new SQL Server Database Engine capabilities. The Transact-SQL enhancements in SQL Server Beta 2 increase your expressive powers in query writing, allowing you to improve the performance of your code and extend your error management capabilities.
A common table expression CTE is a temporary, named result set that can be referred to by a defining statement. In its simple form, you can think of a CTE as an improved version of a derived table that more closely resembles a non-persistent type of views. You define the CTE only once, and you can refer to it several times in your query.
In the definition of the CTE, you can refer to variables that are defined in the same batch.
Structured Design - Page 3 - Le Couteau de Library
You use derived tables when you want to refer to a query result as if it were a table, but when you do not want to create a persistent view in the database. Derived tables, however, have a limitation that is relaxed by CTEs: you cannot define a derived table once in your query and use it several times; instead, you must define several derived tables with the same query. Alternatively, you can define a CTE once and use it several times in a query without persisting it in the database. Non-recursive CTEs increase your expressive power. For each piece of code that uses non-recursive CTEs, however, you can usually write longer code that achieves the same results by using other Transact-SQL constructs, such as derived tables.
The case is different with recursive CTEs. When a CTE refers to itself, it is considered recursive. Recursive CTEs are constructed from at least two query parts or members, in recursive query parlance. One part is a non-recursive query part, also referred to as the anchor member AM. The other part is the recursive query part, also referred to as the recursive member RM. These operators perform some manipulation on an input table-valued expression, and produce an output table as a result. It widens the input table expression based on a given pivot column, generating an output table with a column for each unique value in the pivot column.
Real-World SQL-DMO for SQL Server by Allen Mitchell, Mark Allison (Paperback, 2002)
The PIVOT operator is useful for handling open-schema scenarios and for generating cross tab reports. In an open-schema scenario, you maintain entities with sets of attributes that are either not known ahead or are different for each entity type. Your application's users define the attributes dynamically. Instead of predefining many columns and storing many NULL s in your tables, you split the attributes into different rows and store only the relevant attributes for each entity instance.
PIVOT allows you to generate cross tab reports for open-schema and other scenarios in which you rotate rows into columns, possibly calculating aggregations along the way, and presenting the data in a useful form. It narrows the input table expression based on a pivot column. The APPLY relational operator allows you to invoke a specified table-valued function once for each row of an outer table expression. You can refer to columns of the outer table as arguments to the table-valued function.
If the table-valued function returns an empty set for a given outer row, that outer row is not returned in the result. NULL s are returned as the column values that correspond to the columns of the table-valued function. Earlier versions of SQL Server require you to include error handling code after every statement that was suspected of error, similar to Microsoft Visual Basic 6. To centralize error checking code, you had to use labels and GOTO statements. Furthermore, errors such as data type conversion errors caused your batch to terminate, so you couldn't trap those with Transact-SQL.
Errors that previously caused a statement, level, batch, or transaction to terminate can now be caught and handled, provided that those errors are not severe enough to cause severance of the connection. As opposed to triggers that are processed synchronously, an event notification is an event mechanism that allows asynchronous consumption. An event notification sends XML data to a specified Service Broker service, and event consumers consume it asynchronously. SQL Server includes support for rich, full-text applications.
Cataloging capabilities have been enhanced to provide greater flexibility over what is cataloged. Query performance and scalability have been improved dramatically, and new management tools provide greater insight into the full-text implementation.
As part of this initiative, which was introduced company-wide in January , Microsoft now follows development processes that help to ensure that our products and product deployments are secure by design, secure by default, and secure in deployment. After deployment, Microsoft supports on-going customer and partner communications about security issues. Generally, these features and improvements fall into the following three areas: Restricting user access to the SQL server: Greater control on access to SQL Server, and investments in mechanisms that enable an administrator to control access to SQL Server through policies.
Disabling services and restricting service configuration: Providing the ability for administrators to restrict access to resources within SQL Server, at an administrator's designated scope and at a fine degree of granularity, and to ensure that they have an easily manageable system without violating the principle of least privileges. Because certain services are disabled by default for new server installations, customers are now more actively involved in deciding which specific additional services they want to enable. Throughout the development cycle of the product, new features are reviewed and tested for security to help reduce the surface area of attack.
Conclusion Microsoft SQL Server provides the tools that developers need to build new classes of database applications. By removing the barriers to code execution and storage location, and by integrating standards such as XML, SQL Server opens up a world of possibilities to the database developer. This paper is only an introduction to what you will be able to do with SQL Server Source: Microsoft Developers Network. Products Navigation choose your database tool. Site Search Site Map. Our Partnership Status. Choosing Between Transact-SQL and Managed Code When you write stored procedures, triggers, and user-defined functions, one decision you will now have to make is whether to use traditional Transact-SQL or a programming language that is compatible with the.
Multiple Active Result Sets Multiple active result sets MARS provides the ability to have more than one pending request per connection, in particular to have more than one default result set open per connection.
This second procedure logs into the server with the passed login and password. Sever object. The object's Connect method logs into the server. Next, the procedure prints the number of databases on the server by referencing the Count property of the server's Databases collection.