Introduction
... Actors (800k), Movies (400k), Directors, … • Relationships: who played where, who directed what, … Want to store and process locally; what functions do we need ? ...
... Actors (800k), Movies (400k), Directors, … • Relationships: who played where, who directed what, … Want to store and process locally; what functions do we need ? ...
DATABASE ADMINISTRATOR II - DBA2
... ABCWUA Position Description DATABASE ADMINISTRATOR II Status APPROVED ...
... ABCWUA Position Description DATABASE ADMINISTRATOR II Status APPROVED ...
Choosing database architecture - Information Management and
... SQL – DDL commands, data types Creating, altering, deleting databases and tables SQL – DML Populating tables Viewing databases and tables Retrieving data from tables Aggregate operators Pattern matching Joining tables Sub queries Outer joins Database systems performance issues Database performance P ...
... SQL – DDL commands, data types Creating, altering, deleting databases and tables SQL – DML Populating tables Viewing databases and tables Retrieving data from tables Aggregate operators Pattern matching Joining tables Sub queries Outer joins Database systems performance issues Database performance P ...
Document
... 1.What is a foreign key? What conditions must be satisfied for the values of a foreign key? Foreign key (FK) is defined as follows: i) Consider two relation schemas R1 and R2; ii) The attributes in FK in R1 have the same domain(s) as the primary key attributes PK in R2; the attributes FK are said to ...
... 1.What is a foreign key? What conditions must be satisfied for the values of a foreign key? Foreign key (FK) is defined as follows: i) Consider two relation schemas R1 and R2; ii) The attributes in FK in R1 have the same domain(s) as the primary key attributes PK in R2; the attributes FK are said to ...
Cost-based query optimization
... – Cheap: e.g size of relation, depth of B-tree. – Expensive: e.g. distibution on non-indexed columns, histograms – Occational statistics updates when load is low ...
... – Cheap: e.g size of relation, depth of B-tree. – Expensive: e.g. distibution on non-indexed columns, histograms – Occational statistics updates when load is low ...
CS206 --- Electronic Commerce
... Bars(name, addr, license) Drinkers(name, addr, phone) Likes(drinker, beer) Sells(bar, beer, price) Frequents(drinker, bar) ...
... Bars(name, addr, license) Drinkers(name, addr, phone) Likes(drinker, beer) Sells(bar, beer, price) Frequents(drinker, bar) ...
data type
... • Atomicity – each transaction is “all or nothing” • Consistency – any transaction brings the database from one valid state to another • Isolation – concurrent execution of transactions results in a system state that would be obtained if they executed serially • Durability – once a transaction has b ...
... • Atomicity – each transaction is “all or nothing” • Consistency – any transaction brings the database from one valid state to another • Isolation – concurrent execution of transactions results in a system state that would be obtained if they executed serially • Durability – once a transaction has b ...
5.01 Outline Notes
... The relationship is developed when common fields in the tables are linked, such as the Customer ID field in a Customer Address table and the Customer ID field in a Purchases table. ...
... The relationship is developed when common fields in the tables are linked, such as the Customer ID field in a Customer Address table and the Customer ID field in a Purchases table. ...
Many-to-Many Relationships
... • Combined keys necessary when a pair of oneto-many relationships is built into a separate table • Using the AutoNumber field type keeps order • Relationships window shows visual relationships • Enforce referential integrity ...
... • Combined keys necessary when a pair of oneto-many relationships is built into a separate table • Using the AutoNumber field type keeps order • Relationships window shows visual relationships • Enforce referential integrity ...
Lesson/Domain 6: Telecommunications and networking
... 6. C. Common Object Request Broker Architecture (CORBA) is a standard that enables objects to communicate with one another regardless of their programming language or platform type. CORBA was created by the Object Management Group (OMG). 7. B. Polyinstantiation means that a copy of an object is made ...
... 6. C. Common Object Request Broker Architecture (CORBA) is a standard that enables objects to communicate with one another regardless of their programming language or platform type. CORBA was created by the Object Management Group (OMG). 7. B. Polyinstantiation means that a copy of an object is made ...
A Relational Database for Inventory and Asset Management
... equipment itself. This means that it is vitally important for there to be one central location where all asset management informations can be stored, and easily updated. The nature of this requirement quickly rules out any non-electronic or hard-copy forms of information storage, as the number of r ...
... equipment itself. This means that it is vitally important for there to be one central location where all asset management informations can be stored, and easily updated. The nature of this requirement quickly rules out any non-electronic or hard-copy forms of information storage, as the number of r ...
Résumé Gitika Aggarwal - web.iiit.ac.in
... Recently, with the dramatic improvements in global interconnectivity due to the Internet, the web community has been witnessing a boom in the number and variety of dataintensive applications. However, a simultaneous explosion in the user-base for these applications has given rise to major scalabilit ...
... Recently, with the dramatic improvements in global interconnectivity due to the Internet, the web community has been witnessing a boom in the number and variety of dataintensive applications. However, a simultaneous explosion in the user-base for these applications has given rise to major scalabilit ...
Why do I see this?
... Static vs. Dynamic data • For “static” web data: problem addressed by search engines – Allow users to specify criteria for search (e.g. keywords), and rank the results. ...
... Static vs. Dynamic data • For “static” web data: problem addressed by search engines – Allow users to specify criteria for search (e.g. keywords), and rank the results. ...
- Allama Iqbal Open University
... Q. 2 Compare and contrast the role of a database supervisor with database administrator. You may support your answer with examples from local environment. ...
... Q. 2 Compare and contrast the role of a database supervisor with database administrator. You may support your answer with examples from local environment. ...
Mapping an ERD to a Relational Database
... relationship. This new relation will have a composite primary key comprising the primary keys of the participating entity types and any discriminator attribute, plus attributes of the relationship (if any) ACS-2814 ...
... relationship. This new relation will have a composite primary key comprising the primary keys of the participating entity types and any discriminator attribute, plus attributes of the relationship (if any) ACS-2814 ...
Chapter 4 - Faculty of Science and Technology
... these products purchased, and when are they due for renewal? Have there been any service issues related to these products in the past? • Communication preferences: What is the preferred medium of communication – mail, telephone, e-mail, face-to-face, etc.? Amazon.com, for example, allows customer to ...
... these products purchased, and when are they due for renewal? Have there been any service issues related to these products in the past? • Communication preferences: What is the preferred medium of communication – mail, telephone, e-mail, face-to-face, etc.? Amazon.com, for example, allows customer to ...
Title
... • This will select all columns of data from the named table if the named column data matches the operator and text string you entered ...
... • This will select all columns of data from the named table if the named column data matches the operator and text string you entered ...
UnderstandingRDBMS_100308_expanded
... provided by primary key. Examples: Check #, date, amount, payee (check register) Student ID, first and last names, address, phone # (student records) ...
... provided by primary key. Examples: Check #, date, amount, payee (check register) Student ID, first and last names, address, phone # (student records) ...
DATA MODELS
... relational data model. This is because relational model can be used for representing most of the real world objects and the relationships among them. Security and integrity are maintained easily by relational data model. Also, use of relational model for database design increases the productivity of ...
... relational data model. This is because relational model can be used for representing most of the real world objects and the relationships among them. Security and integrity are maintained easily by relational data model. Also, use of relational model for database design increases the productivity of ...
Sean Zinsley
... Responsible for the two key product lines representing $12 million in revenue. Launched new, three tiered software platform to replace existing architecture. Responsible for all aspects of the product management cycle and product rollout including all stakeholder meetings and client upgrade is ...
... Responsible for the two key product lines representing $12 million in revenue. Launched new, three tiered software platform to replace existing architecture. Responsible for all aspects of the product management cycle and product rollout including all stakeholder meetings and client upgrade is ...
No Slide Title
... A Georelational to a Geodatabase Model • coverage and shapefile data structures – homogenous collections of points, lines, and polygons with generic, 1- and 2-dimensional "behavior" ...
... A Georelational to a Geodatabase Model • coverage and shapefile data structures – homogenous collections of points, lines, and polygons with generic, 1- and 2-dimensional "behavior" ...
ppt
... • In the exercises students can learn basics of SQL programming language (in Oracle) • During the semester through practical assignments students learn how to: – create database, create and alter tables in the database, insert-update-delete data, create and work with indexes, constraints, roles and ...
... • In the exercises students can learn basics of SQL programming language (in Oracle) • During the semester through practical assignments students learn how to: – create database, create and alter tables in the database, insert-update-delete data, create and work with indexes, constraints, roles and ...
Database
... An employee can handle one or more orders. A product can be ordered zero or more times. ...
... An employee can handle one or more orders. A product can be ordered zero or more times. ...
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.