Implementation of physical data model DATABASE DESIGN & DEVELOPMENT Implementation of physical data model Zatil Ridh'wah Hj Darot

microsoft access implementation of physical data model

microsoft access MS Access is a relational database system for workstations that run the Microsoft Windows operating system. MS Access is typically used by individuals for data they use personally, but in some situations a single MS Access database may be used by a group of people or small department.

Creating table Define the table give the table a name and Define the type of data to be stored in each of the fields a name will be text, a price could be currency and a date would have a data type of Date Set any field properties for each field Various formats can be defined for dates e.g. General Date, Long Date, Medium Date, Short Date etc.

defining relationships After tables have been created for each subject in your database, you need a way of telling Microsoft Access how to bring that information back together again. The next step is to __________________________ Once the relationships are created, you can start entering data into the tables. After you've done that, you can create queries, forms, and reports to display information from several tables at once.

enforcing referential integrity helps discipline data entry It is a system of rules that Microsoft Access uses to ensure: relationships between records in related tables are ____________ related data are not inadvertently ______________

When referential integrity is enforced, observe the following rules: You can't enter a value in the key field of the related table that doesn't exist in the key of the primary table. You can't change a primary key value in the primary table, if that record has related records. You ______________from a primary table if matching records exist in a related table. To enforce referential integrity, click the Enforce Referential Integrity check box in the Edit Relationships dialog box.

data stores A Data Store is a connection to a store of data, whether the data is stored in a database or in one or more files. The data store may be used as the source of data for a process, or you may export the ____________ results of a process to a data store, or both. Type of Data stores: Internal storage is seen as an integral part of your computing device. External storage is something you add on such as cloud.

database storage All information in a database is organized and structured in database tables. These tables are stored on the hard disk of the database server. The information itself is typically saved in one of the many types of ordered and unordered flat files, ISAM, heaps, hash buckets or B+ trees. The most commonly used database structures are the B+ trees and ISAM.

how table data is stored

Oracle database A Relational Database Management System – RDBMS The Oracle database stores data logically in tablespaces and physically in data files. Tablespaces: Can belong to only one database Consist of one or more data files Are further divided into logical units of storage Data files: Can belong to only ______________ and one database Are a repository for schema object data Database Tablespace Data files

Cloud storage A database that typically runs on a cloud computing platform, access to it is provided as a service. With a database as a service model, application owners do not have to install and maintain the database themselves. Instead, the database service provider takes responsibility for installing and maintaining the database, and application owners are charged according to their usage of the service. A primary concern related to cloud storage is the security, integrity, and confidentiality of data, which becomes more prone to being compromised when __________________________ and other third parties. There can also be legal and regulatory implications that result from relocating data across geographical or national boundaries. Another issue applies specifically to the performance of large databases. LANs provide locally stored data with network reliability and latency levels that are superior to those of WANs.

in-house server

cloud server

references Conolly, T. and Begg, C. (2014) Database Systems: A Practical Approach to Design, Implementation and Management. 6th Ed. Global Edition. Pearson.