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This SQL statement retrieves the data from all columns for all rows in the people table: SELECT * FROM people; This SQL retrieves all the values from just the name column of rows in the people table (for example, Fred Bloggs, Chris Scott, Laura Smith ): SELECT name FROM people; This SQL retrieves rows with an id column equal to 2 from the people table (usually, because id is a column containing unique values, only one row would be returned for such a query): SELECT * FROM people WHERE id = 2; This SQL retrieves any rows that have a name column equal to Chris Scott : SELECT * FROM people WHERE name = "Chris Scott"; This SQL retrieves all rows of people whose ages are between 20 and 40 inclusive: SELECT * FROM people WHERE age >= 20 AND age <= 40; The conditions used in SQL are somewhat similar to those used in Ruby and other programming languages, except that logical operators such as AND and OR are written as plain English.

Table 3-7

Also, as in Ruby, you can use parentheses to group expressions and build up more complex requests It s also possible to have the results returned in a certain order by appending an ORDER BY clause such as ORDER column_name to the SQL query You can further append ASC to the column name to sort in an ascending fashion, or DESC to sort in a descending fashion For example, this SQL returns all rows from the people table ordered by the name column in descending order (so names starting with Z come before those beginning with A): SELECT * FROM people ORDER BY name DESC; This SQL returns all rows of those people between the ages of 20 and 40 in order of age, youngest first: SELECT * FROM people WHERE age >= 20 AND age <= 40 ORDER BY age ASC;.

Before leaving the topic of rendered controls, take a look at the issue of view state managed by controls If you go back to some of the classic Active Server Pages (ASP) examples in earlier chapters, you might notice something disconcerting about the way some of the controls rendered after posting back After you select something in the combo box and make a round-trip to the server, by the time the response gets back, the controls (especially selection controls) have lost their state Recall that the basic Web programming model is all about making snapshots of the server s state and displaying them using a browser It essentially tries to perform stateful user interface (UI) development over a disconnected protocol ASP .

The simplest way to use Remote Assistance is through an instant messenger connection. The novice initiates the session by following these steps: 1. Sign in to Windows Live Messenger and open a chat window with your prospective helper, if one is not already open. 2. In the chat window, click the Activities button and then click Request Remote Assistance. Alternatively, click the Show Menu button and then click Actions, Request Remote Assistance. Your request appears as part of the conversation. 3. Specify a password for the session; the expert will be asked to enter the same password. If you have any doubt at all that the person at the other end of the instant messaging connection is who they appear to be, call the expert and provide the password by phone or send it by e-mail. 4. If the expert accepts the request (by clicking the Accept link in the chat window and correctly entering the agreed-upon password), Remote Assistance then

Configure each VPN server s connection to the intranet. Run the Routing And Remote Access Server Setup Wizard.

NET server-side controls include a facility for holding onto a page s visual state it s a property in the Page named ViewState, and you can easily access it any time you need it ViewState is a dictionary (a name/value collection) that stores any serializable object Most ASP NET server-side controls manage their visual state by storing and retrieving items in the ViewState For example, a selection control might maintain the index of the selected item between posts so that the control knows which item has its selected attribute assigned and can render the appropriate markup to show that item as selected in the user s browser The entire state of a page is encoded in a hidden field between posts For example, if you browse to an .

As you can see in Figure 7-5, the new title block has been written over the text despite the fact that you placed it above the content by inserting it at position 0. Why is it written like this The reason is that the content wasn t positioned automatically because it is rendered in a <Grid>. If the container was one that provided automatic layout, for example, a <StackPanel>, the title block would render properly. But the container does not provide layout. The content is presented using an <ItemsControl> called itmCities. This is a child of the Grid, and you can position content in the grid by using the Margin property. Following is the JavaScript code to set the Margin property and push the content down the screen by a few pixels: