... from changing data being read by a user and preventing users from reading data being changed by a user. Locks are acquired and released by user actions; they are managed internally by database ... command. SqlCommand cmd = new SqlCommand(sqlText, conn, tran); // Create the DataAdapter and CommandBuilder. SqlDataAdapter da = new SqlDataAdapter(cmd); SqlCommandBuilder cb = new SqlCommandBuilder(da); ... dataGrid.DataSource = null; [ Team LiB ] Recipe 6.14 Specifying Locking Hints inaSQLServerDatabase Problem You need to pessimistically lock rows in an underlying SQLServer database. ...
... conn.BeginTransaction(IsolationLevel.ReadCommitted); // Create the command. SqlCommand cmd = new SqlCommand(sqlText, conn, tran); // Create the DataAdapter and CommandBuilder. SqlDataAdapter da = new SqlDataAdapter(cmd); ... on a resource. Locks ensure transactional integrity and database consistency by preventing other users from changing data being read by a user and preventing users from reading data being changed ... information about database locks: ã The system stored procedure sp_lock returns a result set containing all active locks. ã The syslockinfo table in the master database contains information about...
... thường đó là Default Instance. Một Instance c aSQLServer 2000 có 4 system databases và mt hay nhiu user database. Cỏc system databases bao gm:ã Master : Ch a tất cả những thông tin cấp hệ thống ... Kế Một Database Tạo Một User Database Chúng ta có thể tạo một database dễ dàng dùng SQLServer Enterprise bằng cách right-click lên trên " ;database& quot; và chọn "New Database& quot; ... and jobs). Cấu Trúc Vật Lý C a Một SQLServer Database Mỗi một database trong SQLServer đều ch a ít nhất một data file chính (primary), có thể có thêm một hay nhiều data file phụ (Secondary)...
... user database được tạo ra thì SQLServer sẽ copy toàn bộ cácsystem objects (tables, stored procedures ) từ Model database sang database mi va to. ã Msdb : Database này được SQLServer Agent ... (SQL) Server nào đó là ta nói đến một Instance c a SQLServer 2000, thông thường đó là Default Instance. Một Instance c aSQLServer 2000có 4 system databases và một hay nhiều user database. ... Sp_help ['object'] Cung cấp thông tin về một database object (table, view ) hay một data type. Sp_helpdb [&apos ;database& apos;] Cung cấp thông tin về một database cụ thể nào đó. Sau đó...
... static void Main() { // formulate a string containing the details of the // database connection string connectionString = " ;server= localhost ;database= Northwind;uid=sa;pwd=sa"; ... illustrates how to use a SqlConnection object to connect to aSQLServerdatabase */ using System; using System.Data; using System.Data.SqlClient; class MySqlConnection { public static ... database to be established when there's a suitable connection already available. When you close a connection, that connection isn't actually closed; instead, your connection is marked...
... Open Calling mySqlConnection.Close() mySqlConnection State has changed from Open to Closed The InfoMessage Event The InfoMessage event fires when the database returns a warning or information ... object. You can produce information and error messages using the SQLServer PRINT or RAISERROR statements, which are described in Chapter 4, "Introduction to Transact- SQL Programming." ... StateChangeEventArgs class. The following example defines a method named StateChangeHandler to handle the StateChange event. You'll notice that the second parameter to this method is a StateChangeEventArgs...
... the instance name ( servername\instancename ). Only SQLServer 2000 can act as a named instance, but you can have many named instances operating at the same time. You can also Run SQLServer ... capabilities. Windows 2000 Advanced Server and Datacenter Server add a “load-balancing” capability to clustering. We will be going into how to design and setup clusters ina later article.Instances ... Mode authentication you are asked to provide a password for the system administrator (sa) account. This account is available so you can authenticate as a “sysadmin” via SQLServer Authentication....
... Download a shareware database management tool You need adatabase management tool to create Microsoft SQLServerdatabase and to export/import the Contact List. You can download the Aqua Data Studio ... either the embedded database (McKoi), or an external database. If you chose the embedded database, you can change to a different one by creatinga new database and configuring it to be used with ... information when connecting to the database sql scripts Each of the database types has asql file that you need to: 1. Modify to point to the right database. 2. Run to create the database...
... settings for using SQL- 92 default settings Statistics Alters current session settings for displaying statistics Transactions Alters current session settings for handling SQLServer Transactions ... categories Category Description Date and Time Alters current session settings for handling of date and time data Locking Alters current session settings for handling SQLServer locking Miscellaneous ... SHOWPLAN_TEXT (from the Query Execution category) is ON, SQLServer returns a result set containing detailed information about how the SQL statements are going to be executed rather than actually...
... object. For my installation of SQL Server, the password to access the Northwind database is sa, and my ConnectionString property is set to: data source=localhost;initial catalog=Northwind;persist ... visually create a DataReader object inVisualStudio .NET (VS .NET); you can only create them using program statements. In this section, you'll see how to create a SqlDataReader object and use ... from a SqlCommand object, which you saw how to create using VS .NET in the previous chapter. That SqlCommand object contained a SELECT statement that retrieved the CustomerID, CompanyName, and...
... Use VisualStudio .NET to debug SQLServer stored procedures (in both standalone mode and from managed code). Discussion Debugging a stored procedure in standalone mode You can debug a stored ... View menu. 2. Create a connection to the database or select an existing connection. 3. Select and expand the node for the database that contains the stored procedure. 4. Expand the Stored Procedures ... procedure in standalone mode from VisualStudio .NET Server Explorer by following these steps: 1. Open the Server Explorer window inVisualStudio .NET by selecting it from the View menu. 2. Create...
... the database. –STANDBY: prevents users from making changes to any data maintained by Data Guard SQL Apply.NONE: normal securityãQuery GUARD_STATUS column in V $DATABASE. ã Database guard level ... Logical Standby Database ãConfigure the database guard to control user access to tables.ãALTER DATABASE GUARD command keywords:ALL: prevents users from making changes to any data in the database. –STANDBY: ... Logical Standby Database with Enterprise ManagerClick “Add Standby Database. ” 7Copyright â 2006, Oracle. All rights reserved. Creating a Logical Standby Database by Using Enterprise Manager ...