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...

Ngày tải lên: 28/10/2013, 18:15

... 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 DataRe...

Ngày tải lên: 26/01/2014, 10:20

... 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...

Ngày tải lên: 26/01/2014, 11:20

... 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 isola...

Ngày tải lên: 17/10/2013, 20:15

... 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...

Ngày tải lên: 07/11/2013, 10:15

... 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...

Ngày tải lên: 07/11/2013, 13:15

... 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(Sta...

Ngày tải lên: 14/12/2013, 13:15

... 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 locki...

Ngày tải lên: 14/12/2013, 18:16