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1. Open the client application that allows you to directly invoke SQL statements. If applicable,
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check with the database administrator to make sure that you re logging in with the credentials necessary to create a database and schema. You might need special permissions to create these objects. Also verify whether there are any parameters you should include when creating the database (for example, log file size), restrictions on the name you can use, or restrictions of any other kind. Be sure to check the product documentation before going any further.
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2. Create a database named INVENTORY (if your RDBMS supports this functionality in
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Oracle you ll want to create a user named INVENTORY, which will implicitly create a schema with the same name). Depending on the product you re using, you ll be executing a statement that s similar to the following:
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CREATE DATABASE INVENTORY;
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If you re required to include any additional parameters in the statement, they would most likely be included in the lines following the CREATE DATABASE clause. Once you execute the statement, you should receive some sort of message telling you that the statement has been executed successfully.
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3. Connect to the new database. The method for doing that will vary from product to product.
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In Oracle, you can connect to a database by entering the appropriate logon information in any of several tools such as SQL*Plus, iSQL*Plus, and SQL Developer. In SQL Server, it s simply a matter of selecting the appropriate database from the Connect drop-down list of databases in the SQL Server Management Studio toolbar, or you can execute the following statement (MySQL uses this same syntax):
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USE Inventory 4. Create a schema named CD_INVENTORY (if your RDBMS supports this functionality).
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Create the schema under your current authorization identifier. Do not include any schema elements at this time. In most cases, you will be executing a statement that looks similar to the following:
CREATE SCHEMA CD_INVENTORY;
(continued)
SQL: A Beginner s Guide
Try This Summary
Step-by-step exercises of this sort can be complicated because they re so dependent on how RDBMS products have implemented various features. As a result, you must rely heavily on product documentation (which you should be using anyway) and, if applicable, database administrators. However, now that you ve gotten through this exercise and have created the necessary database and/or schema environment, you should be ready to move on to the examples and projects in the rest of the book. Because you ve laid the necessary foundation, you re now ready to create, alter, and drop data objects, and insert, modify, and delete the data stored in those objects.
2 Self Test
1. What are the differences between an SQL agent and an SQL implementation 2. Which component of an SQL environment represents a user or role that is granted specific
access privileges to objects and data
A Catalog B Authorization identifier C SQL client module D SQL agent 3. A(n) ____________ is a collection of schemas that form a namespace within the SQL
environment.
4. What is a schema 5. Which statement do you use to add a schema to an SQL environment A ADD SCHEMA B INSERT SCHEMA C CREATE SCHEMA 6. What is the name of the schema that contains definitions for schema objects in a catalog 7. What are the 11 types of schema objects that can be contained in a schema 8. What is a view
2:
Working with the SQL Environment
9. Which schema objects provide the basic unit of data management in the SQL environment A Views B Domains C Base tables D Character sets 10. How does the SQL:2006 standard define a database 11. A (n) ____________ is a name given to an SQL object. 12. How is a regular identifier distinguished from a delimited identifier in an SQL statement 13. Which type of identifier permits spaces to be used as part of the name of an object 14. Your SQL environment includes a catalog named INVENTORY. In that catalog is a schema
named COMPACT_DISCS, and in that schema is a table named ARTISTS. What is the qualified name of that table
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