Tài liệu Using Variables ppt

... cost that you put there earlier. Naming Variables You should adopt a naming convention for variables that help you avoid confusion concerning the variables you have defined. The following ... Using Variables A variable is a storage location that holds a value. You can think of a variable as ... is too easy to get them confused. NOTE Using identifiers that differ only by cas...

Ngày tải lên: 24/12/2013, 09:16

... 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 ... details of these steps in the following sections. Step 1: Declare Variables to Store the Column Values from the SELECT Statement These variables must be compatible with the column t...

Ngày tải lên: 14/12/2013, 13:15

... silence the warning by using the new keyword as follows: class Token { public string Name() { } } class IdentifierToken : Token { new public string Name() { } } Using the new keyword ... later in this chapter), you can create further derived classes that inherit from DerivedClass using the same syntax: class DerivedSubClass : DerivedClass { } In this way, you can c...

Ngày tải lên: 24/12/2013, 09:16

... 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

... [ Team LiB ] Using Templates A template is a custom form you save in your Windows file system, instead of publishing ... contact, or description information before you published the form, you can add the information using the Form Manager. The description displays on the Forms Manager dialog and in the description ... Forms menu. Type the name of the new MessageClass in the field an...

Ngày tải lên: 26/01/2014, 04:20

... hand, web programming using Ajax is not necessary for a site to be successful; sites such as Amazon and eBay, which are clearly doing well in the business arena, are either not using this form of ... Trainer for WestLake Using Ajax for Web Application Development: What Businesses Need To Know Copyright ©2007 Global Knowledge T raining LLC. All rights reserved. Page 2 Benefits of Using...

Ngày tải lên: 10/12/2013, 14:15

... 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

... Figure 3.16: Using the DISTINCT keyword to retrieve distinct Country column values As you can see, the SELECT ... QuantityPerUnit, UnitPrice FROM Products WHERE ProductName LIKE 'Queso%'); Figure 3.22: Using an INSERT statement to add a new row to the Customers table Note You must supply values ... UPDATE statement, along with a SELECT statement that retrieves the mod...

Ngày tải lên: 14/12/2013, 13:15

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

Ngày tải lên: 14/12/2013, 18:16

... @Order_Date Declaring Local Variables in T-SQL You can use variables in T-SQL much like you would in your other coding languages. First, you must declare them. To declare variables in T-SQL, you ... chapter. After you have declared the variables, you need to initialize them before you can use them. Initialing Local Variables in T-SQL To initialize the variables, you will us...

Ngày tải lên: 14/12/2013, 20:16