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Relational Database Concepts and the SQL Server Environment
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procedures, the Details pane will list the tables or stored procedures in the current database. The behavior of the Details pane is quite similar to that of Windows Explorer. If the user selects certain objects in the Console tree, such as a database or a server, the Details pane displays the taskpad a complex report showing the state of the database or server that can also be used to manage the database or server (see Figure 2-3). Taskpads are implemented as HTML pages. Activities can be initiated by clicking links within the taskpad.
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Enterprise Manager has been developed as a Microsoft Management Console (MMC) snap-in. A snap-in is simply a program designed to run inside MMC. Other Back Office server management tools can also run inside MMC. This design is the reason there are two major toolbars within the Enterprise Manager interface. The top one contains options to let the user control MMC and its snap-ins. The lower one is the Enterprise Manager toolbar, and in it you will find menus and icons for administering servers and databases. Before SQL Server 7.0, Enterprise Manager contained a query tool for executing SQL queries against a database. You now have to launch Query Analyzer from the Tools menu. As I mentioned earlier, SQL Mail service can be controlled from the Support Services node in Enterprise Manager (see Figure 2-4).
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Relational Database Concepts and the SQL Server Environment
Figure 2-4.
Support Services in Enterprise Manager
DTS Import and Export Data
Data Transformation Services (DTS) is a component of SQL Server that enables administrators to transfer information between servers and databases. It is not limited to export from and import to SQL Server. It can also be used between any ODBC- or OLE DB-compliant databases, including Oracle, Sybase SQL Server, Access, and FoxPro, and between other storage types such as text files, Excel spreadsheets, and Outlook files. The tangible part of DTS is the DTS Wizard (see Figure 2-5), which can be started from Enterprise Manager (Data Transformation Services) or the Windows menu (Import and Export Data). In the screens that follow, users specify the source and target data locations as well as the transformation to be performed on the data.
SQL Server 2000 Stored Procedure Programming
Figure 2-5.
The DTS Wizard
osql and isql
Before Query Analyzer (and ISQL/W ISQL for Windows), DBAs used a command line utility called isql to run Transact-SQL statements against the server (see Figure 2-6). Tools such as isql are reminiscent of UNIX environments, and they are seldom used now that GUI applications like Query Analyzer are available. Another tool that works from the command prompt is osql. It was introduced in SQL Server 7.0. The major difference between these two command line utilities lies in the API each uses to connect to SQL Server databases: osql uses ODBC to connect, and isql uses DB-Library.
2:
Relational Database Concepts and the SQL Server Environment
Figure 2-6.
isql
SQL Server Profiler
SQL Server Profiler is a component of SQL Server designed to monitor activities on servers and in databases (see Figure 2-7). Before SQL Server 2000 and SQL Server 7.0, this utility was called SQL Trace. Users can use this utility to capture queries against a database, the activities of a particular user application, login attempts, failures, errors, and transactions. It is often used to improve the performance of a system.
Client Network Utility
SQL Server client tools can use different protocols to communicate with SQL Server:
Named pipes TCP/IP
SQL Server 2000 Stored Procedure Programming
Figure 2-7.
SQL Server Profiler
s s s s v
Multiprotocol NWLink IPX/SPX AppleTalk Banyan VINES Shared memory
For each protocol, Microsoft has designed a DLL communication library that is referred to as a Network Library or NetLib. The Client Network Utility is designed to select the protocol and NetLib to be used by other client tools. It is possible to specify a default network library and exceptions on a per-server basis:
2:
Relational Database Concepts and the SQL Server Environment
The Help Subsystem and SQL Server Books Online
Traditionally, due to the nature of the environment, SQL Server client tools (including Enterprise Manager and Query Analyzer) have been light on context-sensitive help, but SQL Server has a subsystem that is a great tool for browsing through its documentation SQL Server Books Online. This subsystem contains the complete set of documentation which used to be delivered on paper in the form of an online, searchable, indexed hierarchy of documents. You can start SQL Server Books Online by selecting Start | Programs | Microsoft SQL Server 2000 | Books Online (see Figure 2-8). You can browse through the Contents of the hierarchy as in Windows Explorer, or you can switch to the Index tab to see a list of keywords or the Search tab to define search criteria. The Favorites tab enables you to record pages that you want to refer to later.
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