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The dynamic values box stores the values you add. Most of the time, you will have only one value; however, the design allows for multiple values should one of them be null. A common use for this technique is choosing a customer value for an opportunity or case. Because the customer of an opportunity can either be an account or a contact, you may want to configure dynamic values to accommodate either scenario (Figure 14-26). In this example, Microsoft Dynamics CRM will try to populate the top value in the box (Account Name) as the dynamic value. If no account name value exists because the customer of the opportunity is a contact, Microsoft Dynamics CRM will try to populate the dynamic value with the next value in the box. If that value doesn t exist either, workflow will populate the dynamic value using the default value that you specify.

In Listing 4-13, I ve commented out the WHERE clause so the SELECT statement will see all four Doe family entries, and accordingly, will raise a TOO_MANY_ROWS exception On lines 52 through 54, I ve also added a WHEN TOO_MANY_ROWS clause to catch the raised exception, and in turn, capture the number of rows returned by the SELECT statement Guess what On line 53, sql%rowcount reports that only one row was selected So PL/SQL has no idea how many rows actually match the query It only knows that more than one exists, and that s a problem where will PL/SQL put the data from rows 2 and on There s actually no place for the data, so PL/SQL appropriately throws an exception.

Note Creating these samples assumes you have Microsoft Dynamics CRM System Administrator,

After all, the query was supposed to be a singleton query! You can add PL/SQL code to predetect too many rows, similar to the technique demonstrated in Listing 4-3, when I was trying to predetect a duplicate row If count() returns a value greater than one, the program will know that there s more than one row But once again, PL/SQL provides us with some syntactic sugar that allows us to use an exception to detect a condition Yes, again that syntactic sugar catching a TOO_MANY_ROWS exception breaks my rule You should always maintain control over your program! I ll admit it, I use it I catch the exception I don t like it But as I ll show you in the next chapter, you ll need to write a lot of extra code to maintain control, so PL/SQL programmers commonly use the exception TOO_MANY_ROWS.

Managers often want to view which of their direct reports are falling behind schedule and which are completing their activities on time. We show you how to create an activity view to quickly mine the Microsoft Dynamics CRM database for this information.

Once again, if you re going to rely on the TOO_MANY_ROWS exception, you must keep in mind that any code that comes after your SELECT statement will not be executed if your SELECT statement raises TOO_MANY_ROWS! That s enough of that Now let s see you put what I just said to work..

The following text further describes the use case diagram shown in Figure 2-3: Description: The customer enters the flight number and indicates the seats being requested. After the customer submits the request, confirmation information is displayed. Preconditions: The customer has looked up the flight information. The customer has logged in and is viewing the flight booking screen. Postconditions: The customer is sent a confirmation e-mail outlining the flight details and the cancellation policy. As you can see from Figure 2-3, certain relationships can exist between use cases. The Reserve Seat use case includes the View Flight Info use case. This relationship is useful because you can use the View Flight Info use case independently of the Reserve Flight use case. This is called inclusion. You cannot use the Reserve Seat use case independently of the View Flight Info use case, however. This is important information that will affect how you model the solution. Another way that use cases relate to each other is through extension. You might have a general use case that is the base for other use cases. The base use case is extended by other use cases. For example, you might have a Register Customer use case that describes the core process of registering customers. You could then develop Register Corporate Customer and Register Retail Customer use cases that extend the base use case. The difference between extension and inclusion is that in extension, the base use case being extended is not used on its own. Figure 2-4 demonstrates how you model extension in a use case diagram.