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The last two executions try to update (the third one) and insert (the fourth one) a new customer with a name that is too short according to the check constraint on the Name column, and both receive an error message. 3. To clean up after this exercise, close all open query windows in SQL Server Management Studio, open a new query window, and execute the SQL statements below:

Lesson Summary. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 210

Lesson Review . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 210

USE master; DROP DATABASE TestDB;

Lesson 2: Designing Database Security . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 211

Server-Level Permission Granted: ADMINISTER BULK OPERATIONS Granted: CREATE DATABASE Granted: ALTER RESOURCES Granted: ALTER ANY CONNECTION, ALTER SERVER STATE Granted: ALTER ANY LOGIN Granted: ALTER ANY ENDPOINT, ALTER RESOURCES, ALTER SERVER STATE, ALTER SETTINGS, SHUTDOWN, VIEW SERVER STATE Granted: ALTER ANY LINKED SERVER Granted with GRANT option: CONTROL SERVER

1. How can you tell SQL Server to roll back a transaction in case an error occurs 2. What is the difference between the functions @@ERROR and ERROR_NUMBER() 3. Can you commit a transaction in the catch block Quick Check Answers 1. In the event of an error that might keep a transaction from completing successfully, you can tell SQL Server to roll back a transaction by setting the XACT_ABORT session option to ON. 2. The function @@ERROR returns the error number of the previously executed s t a t e m e n t a n d c a n b e u s e d o u t s i d e o f a c a t ch b l o c k . T h e f u n c t i o n ERROR_NUMBER() returns the error number that belongs to the error that caused control to be transferred to the current catch block. If not inside of a catch block, ERROR_NUMBER() returns NULL. 3. Yes, you can commit a transaction in the catch block if the transaction is committable. Use the XACT_STATE() function to find out if it is.

Database Users and Roles . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 211

Designing Schemas . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 212

You are a database developer in your organization. Users are reporting that they find objects in the organization s customer relationship management (CRM) application whose parent objects have been deleted. One example is employees who work in a department that doesn t exist in the database. They also complain that prices for some products contain negative values, even though this should not be possible according to the documentation of the applica-

Defining Encryption . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 214