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In my examples I will use an employee organizational chart to demonstrate working with the HIERARCHYID type. Run the following code to create the Employees table, along with a few indexes to support typical queries:

As you can see, the CreditValidationException, CreditProcessingException, and DatabaseException exceptions being thrown are essentially the equivalent of the managed transaction being rolled back. To avoid this all-too-common mechanical code, EJB 3 introduces the idea of controlling transactional outcome through the @javax.ejb.ApplicationException annotation. The best way to see how this works is through an example. Listing 6.2 reimplements the placeSnagItOrder method using the @ApplicationException mechanism to roll back CMTs.

To execute a method, its IL must first be converted to native CPU instructions . This is the job of the CLR s JIT (just-in-time) compiler . Figure 1-4 shows what happens the first time a method is called .

UPDATE dbo.T1 SET col4 = 2, col8 = 2, col90 = 2, col6 = 2 WHERE keycol = 1;

Please note that although the dependencies column lists an entire role, in many cases only a small portion of that role is needed for any given role or feature dependency. For example, the SMTP Server requires only the IIS 6 Management tools from the Web Server role and the SMTP Server remote administration tools from the Remote Server Administration Tools feature. Only by trying to uncheck the various features will you discover the relationships.

Now that I ve covered the fundamentals of TOP and APPLY, I ll present common problems and solutions that use TOP and APPLY.

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The relational operators for C# are shown in Table 4-1. This table assumes two variables: bigValue and smallValue, in which bigValue has been assigned the value 100, and smallValue the value 50.

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side-effect free . This is required because testing conditions should not change the state of the object itself . In addition, all members referenced in a precondition test must be at least as accessible as the method defining the precondition . This is required because callers of the method should be able to verify that they have met all the preconditions prior to invoking the method . On the other hand, members referenced in a postcondition or invariant test can have any accessibility as long as the code can compile . The reason why accessibility isn t important here is because postcondition and invariant tests do not affect the callers ability to invoke the method correctly .

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2. Your DHCP server crashes and cannot be brought back online. Your last backup is four days old. How can you best preserve the current address space without restarting all company computers a. Deploy a new DHCP server with the same address scope, and raise conflict detection attempts to 3. b. Deploy a new DHCP server with the same address scope, and increase the new lease duration to 15 days. c. Restore the previous DHCP database from a backup. d. Run the Ipconfig /renew command on all computers.

Last commit wins Both updates succeed, and the second update overwrites the changes of the first. No error message is shown. First commit wins The first modification is persisted, and the user submitting the second change receives an error message. The user must restart the business process by retrieving the updated comment. This option is often called optimistic locking. Merge conflicting updates The first modification is persisted, and the second modification may be applied selectively by the user.

Open the DHCP console if it isn t already open. In the left pane, expand the containers until you can select Reservations. Select the DHCP reservation for the printer in the left pane and select Con gure Options from the Action menu to open the Reservation Options dialog box. Scroll down in the Available Options to 012 Host Name and select the check box next to it, as shown in Figure 19-4.

2975 2850 3000 5000 3000

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Figure 1-6

As an example, the following code creates the special procedure sp_Proc1, which prints the database context and queries the INFORMATION_SCHEMA .TABLES view first with dynamic SQL, then with a static query:

public new void Load(PersonalizationDictionary state) { PersonalizationEntry pe = state["Hyperlinks"] as PersonalizationEntry; if (pe != null) { this.Hyperlinks = (List<string>) pe.Value; } }