Getting a SQL Server Query Plan

... Country='USA' " + "ORDER BY CompanyName"; // Retrieve the plan into DataReader. SqlDataReader dr = cmd.ExecuteReader( ); // Iterate over all result sets and all rows to get plan. ... Team LiB ] Recipe 10.9 Getting a SQL Server Query Plan Problem You need to retrieve information about how query statements are executed by the SQL Server. Solution Use the SET SHOWPLAN_TEXT statement. ... displaying statistics Transactions Alters current session settings for handling SQL Server Transactions When SHOWPLAN_TEXT (from the Query Execution category) is ON, SQL Server returns a result...

Tài liệu Getting a SQL Server Query Plan pdf

... Team LiB ] Recipe 10.9 Getting a SQL Server Query Plan Problem You need to retrieve information about how query statements are executed by the SQL Server. Solution Use the SET SHOWPLAN_TEXT ... the plan for. cmd.CommandText = "SELECT * FROM Customers WHERE Country='USA' " + "ORDER BY CompanyName"; // Retrieve the plan into DataReader. SqlDataReader ... Create and execute the command to retrieve the plan. SqlCommand cmd = new SqlCommand("SET SHOWPLAN_TEXT ON", conn); conn.Open( ); cmd.ExecuteNonQuery( ); // Create the command...

Tài liệu Create a Point-and-Click SQL Server Query Tool for Users Using a Windows Form doc

... Handles btnView.Click Dim odaDisplay As OleDb.OleDbDataAdapter Dim dtDisplay As New DataTable() Try ' Take the txtSQLString text and create a data table; then set the ' ... data source of the data grid. odaDisplay = New OleDb.OleDbDataAdapter(Me.txtSQLString.Text, mcnn) odaDisplay.Fill(dtDisplay) Me.dgDisplay.DataSource = dtDisplay Catch excData ... creates the new data adapter called odaDisplay passes the Text property of txtSQLString, and then fills the dtDisplay data table. dtDisplay is then set to the DataSource property of the data...

Design and Implement a SQL Server Database

... một (SQL) Server nào đó là ta nói đến một Instance c a SQL Server 2000, thông thường đó là Default Instance. Một Instance c a SQL Server 2000 có 4 system databases và một hay nhiều user database. ... (template) cho các database khác. Ngh a là khi một user database được tạo ra thì SQL Server sẽ copy toàn bộ các system objects (tables, stored procedures...) từ Model database sang database mới v a ... 6.0AuthorsAuthID First Name Last NameA1John BrownA2Matthew BortnikerA3Rick JohnsonA4Peter WrightA5James MoonAuthorBookBookIDAuthID1 A1 2 A2 2 A3 3 A4 3 A5 3 A1 Ngoài ra một trong những điều quan trọng là...

Design and Implement a SQL Server Database

... ta nói đến một Instance c a SQL Server 2000, thông thường đó là Default Instance. Một Instance c a SQL Server 2000 có 4 system databases và một hay nhiều user database. Các system databases bao ... user database được tạo ra thì SQL Server sẽ copy toàn bộ các system objects (tables, stored procedures...) từ Model database sang database mới v a tạo. • Msdb : Database này được SQL Server Agent ... (schedule alerts and jobs). 3.2. Cấu Trúc Vật Lý C a Một SQL Server Database Mỗi một database trong SQL Server đều ch a ít nhất một data file chính (primary), có thể có thêm một hay nhiều data file...

Specifying Locking Hints in a SQL Server Database

... SqlCommand(sqlText, conn, tran); // Create the DataAdapter and CommandBuilder. SqlDataAdapter da = new SqlDataAdapter(cmd); SqlCommandBuilder cb = new SqlCommandBuilder(da); // Fill table using ... READUNCOMMITTED Same as NOLOCK. REPEATABLEREAD Use the same locking as a transaction with an isolation level of REPEATABLE READ. SERIALIZABLE Use the same locking as a transaction with an isolation level ... the DataAdapter. DataTable dt = new DataTable( ); da.Fill(dt); // Bind the default view of the table to the grid. dataGrid.DataSource = dt.DefaultView; cancelButton.Enabled = true; dataGrid.ReadOnly...

Using a SqlConnection Object to Connect to a SQL Server Database phần 1

... ADO.NET automatically 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 ... 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 as unused and ... use a SqlConnection object to connect to a SQL Server database */ using System; using System.Data; using System.Data.SqlClient; class MySqlConnection { public static void Main()...

Debugging a SQL Server Stored Procedure

... setting a breakpoint. • The database connection from your application must be established with the .NET data provider for SQL Server before debugging a mixed-language application. After that, ... not work after the first time. When a connection is obtained from the pool rather than created, SQL debugging is not reestablished. • Changes to locals or parameter variables that are cached ... the SQL interpreter are not automatically modified and there is no way to force the cache to refresh. SQL Server caches variables when the execution plan determines that they will not be dynamically...

Tài liệu Using a SqlConnection Object to Connect to a SQL Server Database phần 2 doc

... SqlConnection(" ;server= localhost;database=Northwind;uid=sa;pwd=sa"); // monitor the StateChange event using the StateChangeHandler() method mySqlConnection.StateChange += new StateChangeEventHandler(StateChangeHandler); ... StateChangeHandler() method with the StateChange event of the mySqlConnection object: mySqlConnection.StateChange += new StateChangeEventHandler(StateChangeHandler); Whenever the StateChange ... System.Object class. The second parameter is an object of a class that is derived from the System.EventArgs class. The EventArgs class is the base class for event data and represents the details of...

Tài liệu Specifying Locking Hints in a SQL Server Database doc

... command. SqlCommand cmd = new SqlCommand(sqlText, conn, tran); // Create the DataAdapter and CommandBuilder. SqlDataAdapter da = new SqlDataAdapter(cmd); SqlCommandBuilder cb = new SqlCommandBuilder(da); ... 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 ... with an isolation level of REPEATABLE READ. SERIALIZABLE Use the same locking as a transaction with an isolation level of SERIALIZABLE. Table 6-22. SQL Server locking hints for granularity...

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