Application Development Concepts
... • iSQLPlus on the web • SQLPlus “Thick” Client – Universal Oracle client – Available on BC network ...
... • iSQLPlus on the web • SQLPlus “Thick” Client – Universal Oracle client – Available on BC network ...
Chapter 1
... • DBMS provides conceptual representation • User or programmer does not need to know how the DBMS store the data in the disk / file. ...
... • DBMS provides conceptual representation • User or programmer does not need to know how the DBMS store the data in the disk / file. ...
Slides
... 4. Controls access to data from many users at once (concurrency), without allowing “bad” interactions that can corrupt the data accidentally. 5. Recovers from software failures and crashes. ...
... 4. Controls access to data from many users at once (concurrency), without allowing “bad” interactions that can corrupt the data accidentally. 5. Recovers from software failures and crashes. ...
DBMS Example - Brock University
... The DBMS Engine • Intermediary between the design tools , the run-time subsystems, and the data ...
... The DBMS Engine • Intermediary between the design tools , the run-time subsystems, and the data ...
MIS2502: Exam 1 Study Guide
... o Implement one‐to‐many relationships by placing a primary key from one table into a second table as a foreign key o Create many‐to‐many relationships by decomposing two entities in the ERD into three tables in the schema Given data from two tables, be able to draw the results of a join of thos ...
... o Implement one‐to‐many relationships by placing a primary key from one table into a second table as a foreign key o Create many‐to‐many relationships by decomposing two entities in the ERD into three tables in the schema Given data from two tables, be able to draw the results of a join of thos ...
JEOPARDY
... In Table Design View, this is how you control what type of data will be entered in a field. ...
... In Table Design View, this is how you control what type of data will be entered in a field. ...
bar - KTH
... A key declaration can also be another element in the list of elements of a CREATE TABLE statement. This form is essential if the key consists of more than one attribute. May be used even for one-attribute keys. ...
... A key declaration can also be another element in the list of elements of a CREATE TABLE statement. This form is essential if the key consists of more than one attribute. May be used even for one-attribute keys. ...
Introduction to SQL and Data Storage Technologies
... • We can use a relational data model to create a better design – Entity-Relationship (ER) model ...
... • We can use a relational data model to create a better design – Entity-Relationship (ER) model ...
Chapter 9 Physical Database Design Methodology
... Mapping Logical Design to DBMS Physical Implementation Security Implementation Monitoring and Tuning DBMS ...
... Mapping Logical Design to DBMS Physical Implementation Security Implementation Monitoring and Tuning DBMS ...
CRSP SuRvivoR-biaS-fRee uS mutual fund databaSe April 2011 quArterly updAte
... A blank field means either that data was not applicable to a fund or that data is not available. A field with a “?” in it is a flag to indicate further research is required. A field has a zero in it when 1) The fund did not exist; 2) No value could be found; or 3) A calculated value could n ...
... A blank field means either that data was not applicable to a fund or that data is not available. A field with a “?” in it is a flag to indicate further research is required. A field has a zero in it when 1) The fund did not exist; 2) No value could be found; or 3) A calculated value could n ...
Introduction to Data Models
... • In database design there are a number of different models. The two most prevalent models to date are the relational model and the object oriented model. We take a brief look at other models in order to gain an understanding of the need behind models. Since the introduction of electronic databases ...
... • In database design there are a number of different models. The two most prevalent models to date are the relational model and the object oriented model. We take a brief look at other models in order to gain an understanding of the need behind models. Since the introduction of electronic databases ...
Jubail University College Policies
... Database support for various levels of management. Relational Database model. Conceptual data modeling. Logical database design. Integrity and security. Database languages including SQL and QBE. Data and Database administration. Case studies in DBMS development and implementation using MS ACCESS or ...
... Database support for various levels of management. Relational Database model. Conceptual data modeling. Logical database design. Integrity and security. Database languages including SQL and QBE. Data and Database administration. Case studies in DBMS development and implementation using MS ACCESS or ...
Slide 1
... • SQL queries correspond to sequence of relational algebra operations – The previous query requires a join operation between person and acts_in ...
... • SQL queries correspond to sequence of relational algebra operations – The previous query requires a join operation between person and acts_in ...
ppt - Cal Poly Pomona
... noted on the conceptual model • Foreign keys are the primary key of another entity to which an entity has a relationship • Composite keys are primary keys that are made of more than one attribute ...
... noted on the conceptual model • Foreign keys are the primary key of another entity to which an entity has a relationship • Composite keys are primary keys that are made of more than one attribute ...
Document
... data types: To identify the type of data and associated operations for handling it. Null values: If a column in a row has no value then it is said to NULL. The Null should not be used as a Zero value. Nulls can appear in columns of any data type provided they are not restricted by NOT NULL or PR ...
... data types: To identify the type of data and associated operations for handling it. Null values: If a column in a row has no value then it is said to NULL. The Null should not be used as a Zero value. Nulls can appear in columns of any data type provided they are not restricted by NOT NULL or PR ...
CS206 --- Electronic Commerce
... The keys of the connected entity sets. Attributes of the relationship itself. ...
... The keys of the connected entity sets. Attributes of the relationship itself. ...
Design a Relational Database
... used to create a relational database: Table: a list of rows and columns, similar to a spreadsheet, that stores data. Tables may store information about grades, students, products, etc. o Record: a table row containing a meaningful and consistent way of combining information o Field: a table column ...
... used to create a relational database: Table: a list of rows and columns, similar to a spreadsheet, that stores data. Tables may store information about grades, students, products, etc. o Record: a table row containing a meaningful and consistent way of combining information o Field: a table column ...
Normalization for Logical Design
... – Improve the integrity of data • Purpose is to eliminate update anomalies – Minimize storage of redundant data – Reduce the complexity of programming logic • Emphasis now is on maintainability, simplicity of program • Normalized data can minimize complexity of code that manipulates the data – Enhan ...
... – Improve the integrity of data • Purpose is to eliminate update anomalies – Minimize storage of redundant data – Reduce the complexity of programming logic • Emphasis now is on maintainability, simplicity of program • Normalized data can minimize complexity of code that manipulates the data – Enhan ...
SUPP PART-NO
... – Improve the integrity of data • Purpose is to eliminate update anomalies – Minimize storage of redundant data – Reduce the complexity of programming logic • Emphasis now is on maintainability, simplicity of program • Normalized data can minimize complexity of code that manipulates the data – Enhan ...
... – Improve the integrity of data • Purpose is to eliminate update anomalies – Minimize storage of redundant data – Reduce the complexity of programming logic • Emphasis now is on maintainability, simplicity of program • Normalized data can minimize complexity of code that manipulates the data – Enhan ...
ppt - BIL242
... Used to interpret the meaning of the data elements corresponding to that attribute Example: The domain Date may be used to define two attributes named “Invoice-date” and “Payment-date” with different meanings ...
... Used to interpret the meaning of the data elements corresponding to that attribute Example: The domain Date may be used to define two attributes named “Invoice-date” and “Payment-date” with different meanings ...
Relational model
The relational model for database management is an approach to managing data using a structure and language consistent with first-order predicate logic, first described in 1969 by Edgar F. Codd. In the relational model of a database, all data is represented in terms of tuples, grouped into relations. A database organized in terms of the relational model is a relational database.The purpose of the relational model is to provide a declarative method for specifying data and queries: users directly state what information the database contains and what information they want from it, and let the database management system software take care of describing data structures for storing the data and retrieval procedures for answering queries.Most relational databases use the SQL data definition and query language; these systems implement what can be regarded as an engineering approximation to the relational model. A table in an SQL database schema corresponds to a predicate variable; the contents of a table to a relation; key constraints, other constraints, and SQL queries correspond to predicates. However, SQL databases deviate from the relational model in many details, and Codd fiercely argued against deviations that compromise the original principles.