Tài liệu Exploring the Northwind Database pptx
Tài liệu Exploring the Northwind Database pptx
...
Note The value for the primary key in each row of a table must be unique.
In the case of the Customers table, the primary key is the CustomerID column. The key
icon shown to the left of the CustomerID ... table. The Suppliers table contains the suppliers of
products to the Northwind Company. Table 2.7
shows the definition for the columns of
the Products tab...
Tài liệu Understanding the GPS P1 pptx
... technician, or others needing to learn the fundamentals of the
GPS are included here. At the end of the book, there is a list of sug-
gested readings for those who are interested in gathering more ... used
were simple rock cairns marking the trail, either for finding their way
back, repeating their path, or for others to follow. This technique is still
used today. The problems wit...
Tài liệu iTunes: The Digital Jukebox pptx
... double-click it. (The higher the number
in the Bit Rate column, the better the sound quality.) Wait a moment for your
Mac to connect to the appropriate Internet site, and then let the music begin! ... Advanced
Importingtab. Then click the Import CD button at the lower-right corner of the window
(see Figure 11-7
).
Figure 11-7. Watch the display at the top of the w...
Tài liệu Exploring the DataAdapter and DataTable Events docx
... fires.
3. The Command is run to push the change to the database.
4. Any output parameters from the Command are returned.
5. The RowUpdated event of your DataAdapter fires.
6. The AcceptChanges() ... automatically committed in the DataRow. However, if
you start the change to the DataRow using the BeginEdit() method, then the change is
committed only when you call...
Tài liệu Using the Connection Object pptx
... Each of the buttons calls examples, passing the text box called txtCurrentResults. This
text box is located at the bottom of the form. For clarity, the examples have been grouped ... file, username, and password. The second is to open a Jet version of
the Northwind database.
Listing A.3 basConnectionExamples.vb: Two Examples of Opening Jet Databases
Sub DisplayProviderAndS...
Tài liệu Understanding the Property Restrictions pptx
... you're
programming, try not to lose the expression of the problem in a mass of low-level syntax;
try to express the problem you are solving in the solution:
class BankAccount
{
public ... design. It fails to represent the functionality required when
withdrawing money from and depositing money into an account. (If you know of a bank
that allows you to set the balance...
Tài liệu Using the PrintJob Class pptx
... creates the instance of the PrintJob class. The second line
invokes the start() method. The moment that the start() method is called, a pop-up
window (specific to the operating system) asks whether ... true, the user has a printer and has chosen the Print option. It's
then time to use the addPage() method of the PrintJob class to add the printable content.
The...
Tài liệu Stuff - The OSI Model pptx
... control to the layer 2
• Also carries a Frame Check Sequence to make sure the frame received is identical to the one
transmitted.
Sub-layers:
Logical Link Control (LLC)
Runs between the ... flexibility between
the two layers.
Media Access Control (MAC)
Responsible for framing. Builds frames from the 1’s and 0’s that the Physical Layer
picks up from the wire...