ACTUALTESTS ORACLE 1Z0-007 EXAMCHEATSHEET V12 10 04

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Each column is a single data category, or field, and each row constitutes a record, which contains a collection of field entries related to that record. In addition to creating tables to store and organize data, you will build relationships among tables by linking them on key fields. In this section, you'll learn to create tables both manually and using the Table Wizard. Using the Table Wizard Access includes a Table Wizard that helps you create tables easily, especially tables that store certain commonly used types of data.

OLE DB A technology based on COM for connecting to data in various sources, including nonrelational data stores such as Microsoft Exchange folders. One-to-many relationship A relationship between two tables in which a single record in the "one" table can be linked to multiple records in the "many" table, such as customers and orders. The tables are linked on the primary key field in the "one" table and the foreign key in the "many" table. One-to-one relationship A relationship between two tables in which a record in one table can have only one related record in the other table.

Figure 3-6. Flattened data generated by a query is used to produce a table for export. 34 Design Considerations for Large or Complex Databases Designing a database for a client—especially if the database is large or complex-is a whole different ball game from creating a simple database for yourself. Your development experience will go more smoothly—and your customers are more likely to get the databases they want—if you think about three important considerations up front: • A picture is worth a thousand words.

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