Introduction to Database Processing
... Problems with Data Redundancy Waste of space to have duplicate data Causes more maintenance headaches The biggest problem: ...
... Problems with Data Redundancy Waste of space to have duplicate data Causes more maintenance headaches The biggest problem: ...
Lecture 6
... query-by-example and query-by-form (behind each is a corresponding SQL query) - supported by many PC RDBMS (Lotus’ Approach, MS Access,Wall Data’s Cyberprise DBApp) application program interface - written in programming languages such as COBOL, Pascal, Perl, C++ ...
... query-by-example and query-by-form (behind each is a corresponding SQL query) - supported by many PC RDBMS (Lotus’ Approach, MS Access,Wall Data’s Cyberprise DBApp) application program interface - written in programming languages such as COBOL, Pascal, Perl, C++ ...
Conceptual Database Design
... – Process of constructing model of data used in an enterprise, independent of all physical considerations Logical database design – Process of constructing model of data used in an enterprise based on specific data model (e.g. relational), independent of particular DBMS and other physical considerat ...
... – Process of constructing model of data used in an enterprise, independent of all physical considerations Logical database design – Process of constructing model of data used in an enterprise based on specific data model (e.g. relational), independent of particular DBMS and other physical considerat ...
Data/Application integration
... 70% want/need to share data nearer to real-time due to business requirements ...
... 70% want/need to share data nearer to real-time due to business requirements ...
insertion anomaly
... Sample Data • We still can’t easily sort, search, or index our employees. • What if a manager has more than 2 employees, 10 employees, 100 employees? We’d need to add columns to our database just for these cases. • It is still hard to reference our employees in other tables. ...
... Sample Data • We still can’t easily sort, search, or index our employees. • What if a manager has more than 2 employees, 10 employees, 100 employees? We’d need to add columns to our database just for these cases. • It is still hard to reference our employees in other tables. ...
Lecture 6
... • Determine Optionality and Cardinality Determine the number of occurrences of one entity for a single occurrence of the related entity. • Name Relationships Name each relationship between entities • Eliminate Many-toMany Relationships Many-to-many relationships cannot be implemented into database t ...
... • Determine Optionality and Cardinality Determine the number of occurrences of one entity for a single occurrence of the related entity. • Name Relationships Name each relationship between entities • Eliminate Many-toMany Relationships Many-to-many relationships cannot be implemented into database t ...
A Data Warehouse Solution for Account Management
... An appropriate application allows the information to be monthly transferred directly to the NT server. On the NT server, a support table indicates the reports to be produced. Besides the report code and title, there are some Excel spreadsheet codes defining the contents and the groups with authorize ...
... An appropriate application allows the information to be monthly transferred directly to the NT server. On the NT server, a support table indicates the reports to be produced. Besides the report code and title, there are some Excel spreadsheet codes defining the contents and the groups with authorize ...
Queries and Data Models for Prediction and Measurement In Remos
... particular database e.g., creates the tables, defines the attributes and specifies domains for a given application ...
... particular database e.g., creates the tables, defines the attributes and specifies domains for a given application ...
ch15
... United States Copyright Act without express permission of the copyright owner is unlawful. Request for further information should be addressed to the Permissions Department, John Wiley & Sons, Inc. The purchaser may make back-up copies for his/her own use only and not for distribution or resale. The ...
... United States Copyright Act without express permission of the copyright owner is unlawful. Request for further information should be addressed to the Permissions Department, John Wiley & Sons, Inc. The purchaser may make back-up copies for his/her own use only and not for distribution or resale. The ...
Slides from Lecture 1 - Courses - University of California, Berkeley
... • Early batch processing of (primarily) business data ...
... • Early batch processing of (primarily) business data ...
Logical Relational Data Modeling Standards
... The relational model for database management is a database model based on predicate logic and set theory. It was first formulated and proposed in 1969 by Edgar Codd with aims that included avoiding, without loss of completeness, the need to write computer programs to express database queries and enf ...
... The relational model for database management is a database model based on predicate logic and set theory. It was first formulated and proposed in 1969 by Edgar Codd with aims that included avoiding, without loss of completeness, the need to write computer programs to express database queries and enf ...
Camadas I
... application deals with BE one at a time, or does it typically deal with sets of BE? deploy your application locally or remotely? will the BE be used by XML Web services? how important are nonfunctional requirements, such as performance, scalability, maintainability, and programming convenien ...
... application deals with BE one at a time, or does it typically deal with sets of BE? deploy your application locally or remotely? will the BE be used by XML Web services? how important are nonfunctional requirements, such as performance, scalability, maintainability, and programming convenien ...
Chapter 1: Introduction
... •Foreign key constraint: Value in one relation must appear in another •Referencing relation: e.g., instructor •Referenced relation: e.g., department Will discuss this again in Chapter 3 and Chapter 4. ...
... •Foreign key constraint: Value in one relation must appear in another •Referencing relation: e.g., instructor •Referenced relation: e.g., department Will discuss this again in Chapter 3 and Chapter 4. ...
Kite - Pages - University of Wisconsin
... e.g., on-the-fly, best-effort, for non-technical people – enterprises, on the Web, need only a few answers – emergency (e.g., hospital + police), need answers quickly ...
... e.g., on-the-fly, best-effort, for non-technical people – enterprises, on the Web, need only a few answers – emergency (e.g., hospital + police), need answers quickly ...
APPLICATION
... disk. For example, organizations need to retain data about customers, suppliers, and inventory on stable storage because these data are repetitively used. A variable in a computer program is not persistent because it resides in main memory and disappears after the program terminates. Persistency doe ...
... disk. For example, organizations need to retain data about customers, suppliers, and inventory on stable storage because these data are repetitively used. A variable in a computer program is not persistent because it resides in main memory and disappears after the program terminates. Persistency doe ...
txtFirstNAme.Enabled
... Presentation (The form or front end) Business Used to make all the calculated values in the form Enforces the Business rules of your application ...
... Presentation (The form or front end) Business Used to make all the calculated values in the form Enforces the Business rules of your application ...
Introduction of Running Microsoft Access 97
... Linking forms with a command button Example: a simple search on Course and Faculty tables A main form (search) used to input the search condition. A second form (results) used to display the the result of the search. ...
... Linking forms with a command button Example: a simple search on Course and Faculty tables A main form (search) used to input the search condition. A second form (results) used to display the the result of the search. ...
An Introduction to SQL
... The CREATE TABLE command is used to create a table The INSERT command is used to load a table The SELECT command is used to view the data in a table The UPDATE command is used to change the value in a column The DELETE command is used to delete a row in a table ...
... The CREATE TABLE command is used to create a table The INSERT command is used to load a table The SELECT command is used to view the data in a table The UPDATE command is used to change the value in a column The DELETE command is used to delete a row in a table ...
INE1020 Lecture Notes
... Physical level: Microsoft Access - banking.mdb Logical level: • Three tables: Customer, Account and Balance • The primary key in Customer table is customer-id. ...
... Physical level: Microsoft Access - banking.mdb Logical level: • Three tables: Customer, Account and Balance • The primary key in Customer table is customer-id. ...
Access
... values uniquely identify each record in a table • When you include the primary key from one table as a field in a second table to form a relationship between the two tables, it is called a foreign key in the second table ...
... values uniquely identify each record in a table • When you include the primary key from one table as a field in a second table to form a relationship between the two tables, it is called a foreign key in the second table ...
Introduction to GIS - University of Vermont
... that each pair of tables has a field in common, or “key”. In a relational database, the records are generally different in each table The advantages: each table can be prepared and maintained separately, tables can remain separate until a query requires connecting, or relating them, relationships ca ...
... that each pair of tables has a field in common, or “key”. In a relational database, the records are generally different in each table The advantages: each table can be prepared and maintained separately, tables can remain separate until a query requires connecting, or relating them, relationships ca ...
Database model
A database model is a type of data model that determines the logical structure of a database and fundamentally determines in which manner data can be stored, organized, and manipulated. The most popular example of a database model is the relational model, which uses a table-based format.