Chapter 4: Database Management
... • Primary key – An attribute or combination of attributes – Uniquely identifies each record ...
... • Primary key – An attribute or combination of attributes – Uniquely identifies each record ...
Introduction
... Department DBs already exist – Older non-homogeneous software • Even if not, have to start at department level to keep tractable • Many often unwilling to start over – Ego & $$ • Different data organization and data dictionary – E.g. how to store a name • Extra work for some departments so other dep ...
... Department DBs already exist – Older non-homogeneous software • Even if not, have to start at department level to keep tractable • Many often unwilling to start over – Ego & $$ • Different data organization and data dictionary – E.g. how to store a name • Extra work for some departments so other dep ...
Database Concepts - classes.ischool.syr.edu
... Many DBMS applications implement the Relational Model, but none of them enforce it. This permits rookie database designers to shoot themselves in the foot. And many have (including yours truly). The Relational Model has: (Codd’s 3 rules) ...
... Many DBMS applications implement the Relational Model, but none of them enforce it. This permits rookie database designers to shoot themselves in the foot. And many have (including yours truly). The Relational Model has: (Codd’s 3 rules) ...
DBAdminFund_PPT_1.1
... Hire-Date, Current-Salary, Title, Department, and so on. Individual fields are characterized by their maximum length and the type of data (for example, alphabetic, numeric, or financial) that can be placed in them. The facility for creating these specifications usually is contained in the data defin ...
... Hire-Date, Current-Salary, Title, Department, and so on. Individual fields are characterized by their maximum length and the type of data (for example, alphabetic, numeric, or financial) that can be placed in them. The facility for creating these specifications usually is contained in the data defin ...
Study Guide for Mid
... Derived attributes – what are they and what is the tradeoff that needs to be considered with respect to derived attributes? Existence dependence – give an example of two entities in which one entity is existence dependent on the other Strong and weak relationships / identifying and non-identifying r ...
... Derived attributes – what are they and what is the tradeoff that needs to be considered with respect to derived attributes? Existence dependence – give an example of two entities in which one entity is existence dependent on the other Strong and weak relationships / identifying and non-identifying r ...
Session 8 Slideshow
... why this is desirable (d) describe the principal features of a DBMS and how they can be used to create customised data handling applications. (e) understand the relationship between entities and tables (f) understand the components of a relational database, such as tables, forms, queries, reports an ...
... why this is desirable (d) describe the principal features of a DBMS and how they can be used to create customised data handling applications. (e) understand the relationship between entities and tables (f) understand the components of a relational database, such as tables, forms, queries, reports an ...
Databases
... • The table structures will hold data on areas that are needed, eg galleries, artists and paintings. • Queries • There would be no point having tables of stored data if they cannot access it. A DBMS allows you to set up queries to pull out information, e.g. all artists born before 1850. Queries allo ...
... • The table structures will hold data on areas that are needed, eg galleries, artists and paintings. • Queries • There would be no point having tables of stored data if they cannot access it. A DBMS allows you to set up queries to pull out information, e.g. all artists born before 1850. Queries allo ...
Slides
... Example: We can require from the DBMS to not allow the insertion of two different people with the same SIN. ...
... Example: We can require from the DBMS to not allow the insertion of two different people with the same SIN. ...
Chapter Two ( Data Model) Objectives Introduction to Data Models
... A set of entities of the same type Entity set needs not be disjoint (Faculty vs Student) ...
... A set of entities of the same type Entity set needs not be disjoint (Faculty vs Student) ...
Terminology - Midlands State University
... degree programme, level, GPA etc. The body shows the rows of the table with each row representing a student enrolled at a university and a row may have more than 30 000 rows. There is also need to understand the connections or relationships among tables. Rows in a table are usually related to rows i ...
... degree programme, level, GPA etc. The body shows the rows of the table with each row representing a student enrolled at a university and a row may have more than 30 000 rows. There is also need to understand the connections or relationships among tables. Rows in a table are usually related to rows i ...
Chapter 6
... Errors in Relationships Caused by one of three things: 1) Primary and/or foreign keys aren’t set properly in the table design 2) Data already exists in table(s) that violates referential integrity 3) Data types of related fields are incompatible or incorrect ...
... Errors in Relationships Caused by one of three things: 1) Primary and/or foreign keys aren’t set properly in the table design 2) Data already exists in table(s) that violates referential integrity 3) Data types of related fields are incompatible or incorrect ...
Access layer - WordPress.com
... represent the data structures and data relationships within the database. • Two categories: – Conceptual models: focuses on logical nature of the data. What is represented in the data – Implementation models: concerned with how it is represented. ...
... represent the data structures and data relationships within the database. • Two categories: – Conceptual models: focuses on logical nature of the data. What is represented in the data – Implementation models: concerned with how it is represented. ...
Access Powerpoint
... Software that helps you organize data in a way that allows fast and easy access to data Data in a database is stored differently than in other applications: ...
... Software that helps you organize data in a way that allows fast and easy access to data Data in a database is stored differently than in other applications: ...
CPS 216: Advanced Database Systems
... in class to a “new” problem in data management • It is not sufficient to show that you have mastered the concepts taught in class – Ex: Implementation of a B-Tree is insufficient! • An implementation will be required as proof-ofconcept unless you can convince me otherwise ...
... in class to a “new” problem in data management • It is not sufficient to show that you have mastered the concepts taught in class – Ex: Implementation of a B-Tree is insufficient! • An implementation will be required as proof-ofconcept unless you can convince me otherwise ...
Relational Databases and Enterprise Systems
... fields in each database record such as field description, field length, field type (e.g., alphanumeric, numeric), etc. • Database Administrator – The person responsible for the design, implementation, repair and security of a firm’s database. ...
... fields in each database record such as field description, field length, field type (e.g., alphanumeric, numeric), etc. • Database Administrator – The person responsible for the design, implementation, repair and security of a firm’s database. ...
Data Warehousing and Data Mining (OLAP) for Accessing Archived
... • Downloadable in bulk from the NAPP website • Individual details of name, place of birth, age, occupation, parental birthplaces etc. • Most fields converted to numeric codes • First pilot ‐ 164,000 heavy industrial workers chosen for the 67 counties of Pennsylvania • Second ‘industrial strength’ ...
... • Downloadable in bulk from the NAPP website • Individual details of name, place of birth, age, occupation, parental birthplaces etc. • Most fields converted to numeric codes • First pilot ‐ 164,000 heavy industrial workers chosen for the 67 counties of Pennsylvania • Second ‘industrial strength’ ...
CSC 110 - Intro. to Computing - Canisius College Computer Science
... Computers process 1 data item as easily as they process 10 or 10 billion items Filter ...
... Computers process 1 data item as easily as they process 10 or 10 billion items Filter ...
ppt
... – need to offer different views to different users (e.g. registrar, students, professors) ...
... – need to offer different views to different users (e.g. registrar, students, professors) ...
Design documents template
... overview of the software system, such that the reader can more easily follow the more detailed descriptions in the later sections. It provides information on the decomposition of the system into modules (classes), dependencies between modules, hierarchy and partitioning of the software modules. 3. D ...
... overview of the software system, such that the reader can more easily follow the more detailed descriptions in the later sections. It provides information on the decomposition of the system into modules (classes), dependencies between modules, hierarchy and partitioning of the software modules. 3. D ...