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What are the two types of change control processes A normal change control process usually requires a complete risk assess ment, testing of the change, and approval from the owner of the system. An emergency change control process is designed to handle the exceptions when code that has not been fully tested prior to deployment must be pushed to production to fix an urgent issue affecting business operations.

All database objects should be stored in a source code system, with each object being cross-referenced to the application code that is dependent on the database object. Emergency change control procedures enable changes to be deployed to produc tion to fix critical problems that are significantly affecting business operations. When deploying changes to a production environment, you should carefully evaluate each change being requested and deploy changes in a staged manner to minimize the downtime required during the build deployment.

You can use the following questions to test your knowledge of the information in Les son 5, Designing Database Procedures. The questions are also available on the com panion CD if you prefer to review them in electronic form.

Answers to these questions and explanations of why each answer choice is right or wrong are located in the Answers section at the end of the book.

1. A new build has been created that needs to be deployed to production. The build will implement new tables, change some stored procedures, and include a script to make a mass update to all product prices. The development team has not pro vided a script to roll back changes. You need to ensure that you can roll back from the build deployment as quickly as possible with the least amount of effort. Which approach will best meet business requirements A. Create a backup and restore from the backup if an error is encountered. B. Implement DDL and data manipulation language (DML) triggers to log all the changes and then use the logging tables to roll back. C. Generate rollback scripts for all the changes made and then use the roll back scripts if necessary. D. Create a Database Snapshot and restore from the Database Snapshot if an error is encountered.

12

Database conventions are necessary in any organization to provide structure to code as well as a database. This lesson covers a subject that is required in every organiza tion while at the same time leads to the largest number of arguments.

After this lesson, you will be able to:

Define database object-naming conventions. Define consistent synonyms. Define database coding standards. Document database conventions and standards.

Synonyms enable you to create aliases for objects within a database. By creating a syn onym, you isolate an application from any name changes that might occur to object names. Synonyms can be used to alias objects on either a local or remote server. For example, you have an application that uses a linked server call to Table1 in the HumanResources schema on ServerA. If the table were to be moved to a different schema or to a different server, the application would be broken. Instead, you can cre ate a synonym for the table that isolates the application. After the synonym is created, you can move the table between schemas, databases, and servers without affecting the application. The synonym has to be changed to point to the new location, but the application does not have to be changed.

If you want to start an argument in any IT organization, all you need to do is say two words: naming conventions. For some reason, naming conventions create a lot of stress and arguments within any organization. (We can visualize someone turning purple