... Thiết 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; ... động lại SQL Server hay khi ta disconnect. • Model : Database này đóng vai trò như một bảng kẻm (template) cho các database khác. Ngh a là khi một user database được tạo ra thì SQLServer sẽ ... 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)...
... (template) cho các database khác. Ngh a là khi một user database được tạo ra thì SQLServer sẽ copy toàn bộ cácsystem objects (tables, stored procedures ) từ Model database sang database mới v a ... (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...
... command. SqlCommand cmd = new SqlCommand(sqlText, conn, tran); // Create the DataAdapter and CommandBuilder. SqlDataAdapter da = new SqlDataAdapter(cmd); SqlCommandBuilder cb = new SqlCommandBuilder(da); ... 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 software. A locking ... statement. READCOMMITTED Use the same locking as a transaction with an isolation level of READ COMMITTED. READUNCOMMITTED Same as NOLOCK. REPEATABLEREAD Use the same locking as a transaction...
... mySqlConnection.ConnectionString = server= localhost ;database= Northwind;uid=sa; mySqlConnection.ConnectionTimeout = 15 mySqlConnection .Database = Northwind mySqlConnection.DataSource = localhost mySqlConnection.PacketSize ... and workstation ID will be different. Connection Pooling Opening and closing adatabase connection is a relatively time-consuming process. For this reason, ADO.NET automatically stores database ... stores database connections in a pool. Connection pooling offers a great performance improvement because you don't have to wait for a brand new connection to the database to be established...
... mySqlConnection State has changed from Open to Closed The InfoMessage Event The InfoMessage event fires when the database returns a warning or information message produced by the database. ... // create a SqlCommand object SqlCommand mySqlCommand = mySqlConnection.CreateCommand(); // run a PRINT statement mySqlCommand.CommandText = "PRINT 'This is the message from ... that handles an event is known as an event handler. You call this method when a particular event is fired. All event handler methods must return void and accept two parameters. The first parameter...
... command. SqlCommand cmd = new SqlCommand(sqlText, conn, tran); // Create the DataAdapter and CommandBuilder. SqlDataAdapter da = new SqlDataAdapter(cmd); SqlCommandBuilder cb = new SqlCommandBuilder(da); ... as a transaction with an isolation level of READ COMMITTED. READUNCOMMITTED Same as NOLOCK. REPEATABLEREAD Use the same locking as a transaction with an isolation level of REPEATABLE READ. ... 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...
... database to a new database, see the How to export Contact list from McKoi database to Microsoft SQL Server? document. Step 1: Download a shareware database management tool You need adatabase ... configuration. 4. Navigate to Database > Selection and select the newly created Microsoft SQLServer database for all database selections. How to create a Microsoft SQLServerdatabase for the ... IP Address of the MySQL database machine) Port: <3306> (default MySQL port) Database: (left blank / database is created via the opn_mysql .sql script) How to create a Microsoft SQL Server...
... Database Wizard 153Create Database Wizard: Name the Database and Specify Its Location 155Create Database Wizard: Name the Database Files 155Create Database Wizard: Define the Database File Growth ... Configuration 168Using T -SQL to Create and Alter aDatabase 169Monitoring and Maintenance 171 Database Maintenance Plan Wizard 171Maintenance Plan Wizard: Select Databases 172Maintenance Plan ... 156Create Database Wizard: Name theTransaction Log Files 156Create Database Wizard: Define theTransaction Log File Growth 157Create Database Wizard: Completing theCreate Database Wizard 158Configuring...
... 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 ... BY CompanyName"; // Retrieve the plan into DataReader. SqlDataReader dr = cmd.ExecuteReader( ); // Iterate over all result sets and all rows to get plan. do { while (dr.Read( )) ... handling of date and time data Locking Alters current session settings for handling SQLServer locking Miscellaneous Alters current session settings for miscellaneous SQLServer functionality...
... Use Visual Studio .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 ... 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 node. ... [ Team LiB ] Recipe 9.8 Debugging aSQLServer Stored Procedure Problem Given an application that uses aSQLServer stored procedure that is causing errors, you need...
... Text Transfer fromDatabase ListBox Name lstFromDB Label Name Label4 Text Transfer to Database ListBox Name lstToDB Label Name Label5 Text Table(s) to Transfer ListBox Name lstTables ... tables between SQLServer databases. This How-To shows how to allow the user to choose multiple tables and copy them from one database to another as well as tables from two different databases ... sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load LoadSQLServers(Me.lstFromSQLServer) LoadSQLServers(Me.lstToSQLServer) End Sub 3. On the lstFromSQLServer and...
... use the ADO Command object, as well as the Parameter object if you are passing parameters. You will create a Command object and supply the command text, which in this case will be the name of ... Listing A. 7 Northwind SQLServer Database: T -SQL for the Stored Procedure Called CustOrdersHist ALTER PROCEDURE CustOrderHist @CustomerID nchar(5) AS SELECT ProductName, Total=SUM(Quantity) FROM ... Command object you are creating-in this case by using the type of ADODB.CommandTypeEnum.adCmdStoredProc. The next step is to create a parameter that the Command object will use. This parameter...
... Create the connection. SqlConnection conn = new SqlConnection( ConfigurationSettings.AppSettings[" ;Sql_ ConnectString"]); // Create DataAdapter. SqlDataAdapter da = new SqlDataAdapter(sqlText, ... DataSet. DataSet ds = new DataSet( ); // Fill the schema and data. da.FillSchema(ds, SchemaType.Mapped); da.Fill(ds); // Iterate over the table collection in the DataSet. foreach(DataTable ... Microsoft SQL Server Books Online. The GetSchemaTable( ) method of the DataReader also returns all column lengths. The method returns a DataTable containing column metadata for a DataReader, where...