Tài liệu Using Cursors pptx

... in a cursor using the @@CURSOR_ROWS function. You'll learn more about functions later in the " ;Using Functions " section. Step 5: Close the Cursor Close your cursor using the CLOSE ... Using Cursors When you execute a SELECT statement, all the rows are returned in one go. This might ... reference to your cursor using the DEALLOCATE statement. This frees the syst...

Ngày tải lên: 14/12/2013, 13:15

... Using Delegates In the following exercise, you will create a delegate to encapsulate a method that ... called ticking, to arrange for a pulse to be sent every second. This class catches the pulse by using an event (events will be described shortly), and then arranges for the display to be updated ... Clock.Start method so that it adds the Clock.RefreshTime method to the delega...

Ngày tải lên: 21/01/2014, 15:20

... functions. You get the total number of rows using the COUNT() function. For example, the following statement gets the total number of rows in the Products table using the COUNT() function: SELECT COUNT(*) ... 4.3 shows the results of this SELECT statement. Figure 4.3: Using the SUM() function to compute the total of the UnitPrice column Using Mathematical Functions The mathema...

Ngày tải lên: 14/12/2013, 13:15

... variables, and constants using System; using System.Data; using System.Data.SqlClient; // . . . public DataTable MyDataTable { get { // Fill a table using the DataAdapter control. ... Example 7-34. File: UsingDesignTimeFeauresWithComponentsForm.cs // Namespaces, variables, and constants using System; using System.Data; // . . . private void UsingDesignTimeFeau...

Ngày tải lên: 14/12/2013, 18:16

... Using the Connection Object As with ADO.NET, you will be using the Connection object to set up a connection to the database ... provides two other examples of using the connection object, also found in basConnectionExamples.vb. The first is code to open a connection to a Jet database by using a workgroup file, username, ... & cnnNet.ConnectionString cnnNet.Close() End Su...

Ngày tải lên: 14/12/2013, 20:16

... < Day Day Up > Using Actionscript to Draw Lines Dynamically Using ActionScript, you can dynamically draw lines in a movie as it plays—a ... drawing position at any time using moveTo(). When a line is drawn, the drawing position is updated to the endpoint of the drawn line. The following is the syntax for using moveTo(): path.moveTo(x, ... line style, and clear a movie...

Ngày tải lên: 14/12/2013, 22:15

... Using Compound Assignment Operators You've already seen how to use arithmetic operators to ... variable is so common that Microsoft Visual C# lets you perform this task in shorthand manner by using the compound assignment operator, +=. To add 42 to answer, an experienced programmer would

Ngày tải lên: 15/12/2013, 00:15

... program exits. If yours doesn’t do this, though, you’ll need to finish by using the terminal window’s own “close” command.) Using the program’s own “quit” command gives the program time to clean ... want, just do it again. Working with Windows 31 7 January 2002 13:11 32 Chapter 2: Using Window Systems If you’re using a terminal window (such as xter m), and a pr ogram is already running...

Ngày tải lên: 21/12/2013, 11:15

... objects stored in a DataAdapter. Using the DataAdapter Command Object's Transaction Property A DataAdapter stores four Command objects that you access using the SelectCommand, InsertCommand, ... Using Transactions with a DataSet (SQL) In Chapter 3 , "Introduction to Structured Query Language," ... this Transaction object. When you then modify your DataSet and push the...

Ngày tải lên: 24/12/2013, 01:17

Ngày tải lên: 24/12/2013, 05:15