ch18
... Step 3 Translate Logical Data Model for Target DBMS To produce a relational database schema from the logical data model that can be implemented in the target DBMS. ...
... Step 3 Translate Logical Data Model for Target DBMS To produce a relational database schema from the logical data model that can be implemented in the target DBMS. ...
Oracle 11g: Flashback Data Archive
... Triggers compression Compression always occurs while block in memory ...
... Triggers compression Compression always occurs while block in memory ...
System Model Problem Formulation
... Revisited data stream scheduling for time-critical applications Model the problem in a job scheduling perspective The OptProfit algorithm can generate a schedule with ...
... Revisited data stream scheduling for time-critical applications Model the problem in a job scheduling perspective The OptProfit algorithm can generate a schedule with ...
slides - UCLA Computer Science
... Temporal DBs come in three main types: transaction time, valid time, and bi-temporal. Each require a specialized treatment. These issues pose challenges at the logical level (data representation and queries) but significant challenges also occur at the physical level: ...
... Temporal DBs come in three main types: transaction time, valid time, and bi-temporal. Each require a specialized treatment. These issues pose challenges at the logical level (data representation and queries) but significant challenges also occur at the physical level: ...
dbms_design - Google Project Hosting
... Map organizational & user needs to a conceptual model Data Modeling ...
... Map organizational & user needs to a conceptual model Data Modeling ...
Overview Of Database and Java
... setAutoCommit() to allow to specify if you want the connection to automatically commit any transactions or if you prefer to do it manually. If you turn off autoCommit, you can invoke the Connection method commit to commit changes to the database, or rollback to undo any changes since the last comm ...
... setAutoCommit() to allow to specify if you want the connection to automatically commit any transactions or if you prefer to do it manually. If you turn off autoCommit, you can invoke the Connection method commit to commit changes to the database, or rollback to undo any changes since the last comm ...
Chapter 1 Overview of Database Concepts
... • Each occurrence of data in one entity can be represented by many occurrences of the data in the other entity • Example: A class has only one instructor, but each instructor can teach many classes ...
... • Each occurrence of data in one entity can be represented by many occurrences of the data in the other entity • Example: A class has only one instructor, but each instructor can teach many classes ...
IT 244 Database Management System
... Since data is stored in many related files you can end up with: • Data redundancy – keeping many copies of the same type of data • Data inconsistency – updating some of the copies but not the others • Data Dependency – data access is tied to the program so change in data will also change in programs ...
... Since data is stored in many related files you can end up with: • Data redundancy – keeping many copies of the same type of data • Data inconsistency – updating some of the copies but not the others • Data Dependency – data access is tied to the program so change in data will also change in programs ...
Decision support, OLAP
... • Tuples with d attributes can be viewed as points in a d-dimensional ”cube”. • Example: (DBT,’John Doe’,13) can be viewed as the point with coordinates DBT, ’John Doe’, and 13 along the dimensions Course, Name, and Grade. • Natural view of data, specifically for aggregation queries. Dimensions o ...
... • Tuples with d attributes can be viewed as points in a d-dimensional ”cube”. • Example: (DBT,’John Doe’,13) can be viewed as the point with coordinates DBT, ’John Doe’, and 13 along the dimensions Course, Name, and Grade. • Natural view of data, specifically for aggregation queries. Dimensions o ...
The Relational Database Model using SQL Server
... From the table designer window, select the column for which you wish to set the default. While that column is selected, change the default value or binding in the column properties section to the desired value or expression. From the table designer window, right-click on any column and select check ...
... From the table designer window, select the column for which you wish to set the default. While that column is selected, change the default value or binding in the column properties section to the desired value or expression. From the table designer window, right-click on any column and select check ...
The Relational Model
... A set of fields is a key for a relation if : 1. No two distinct tuples can have same values in all key fields, and 2. This is not true for any subset of the key. Part 2 false? A superkey. If there’s >1 key for a relation, one of the keys is chosen (by DBA) to be the primary key. ...
... A set of fields is a key for a relation if : 1. No two distinct tuples can have same values in all key fields, and 2. This is not true for any subset of the key. Part 2 false? A superkey. If there’s >1 key for a relation, one of the keys is chosen (by DBA) to be the primary key. ...
primary key
... Procedures and functions can be invoked also from dynamic SQL SQL:1999 allows more than one function/procedure of the same name (called name overloading), as long as the number of arguments differ, or at least the types of the arguments differ Database Management Systems ...
... Procedures and functions can be invoked also from dynamic SQL SQL:1999 allows more than one function/procedure of the same name (called name overloading), as long as the number of arguments differ, or at least the types of the arguments differ Database Management Systems ...
Curriculum vitae
... of accident on their timeline. By using this app people get immediate help. Developer Android Web-service, JSOAP Eclipse SQL server 2008 Let’s-Carpool This application offers mini-cab rides on route basis across within city or across several cities. With help of this application user have capabiliti ...
... of accident on their timeline. By using this app people get immediate help. Developer Android Web-service, JSOAP Eclipse SQL server 2008 Let’s-Carpool This application offers mini-cab rides on route basis across within city or across several cities. With help of this application user have capabiliti ...
Knowledge assets
... What are the software applications that help you create, store, organize, and retrieve data from one or more databases? ...
... What are the software applications that help you create, store, organize, and retrieve data from one or more databases? ...
How to transform your data from source database to data warehouse
... b. Choose our 3 tables to be added in the diagram c. Hold the FK column from SalesFact table and drag it to its main PK table i. First OrderDate from SalesFact to TimeDim ii. Second ProductID from SalesFact to ProductDim d. This will generate a window to ask for the mappings of columns and if there ...
... b. Choose our 3 tables to be added in the diagram c. Hold the FK column from SalesFact table and drag it to its main PK table i. First OrderDate from SalesFact to TimeDim ii. Second ProductID from SalesFact to ProductDim d. This will generate a window to ask for the mappings of columns and if there ...
Chapter 1
... (Database) application program: a computer program that interacts with database by issuing an appropriate request (SQL statement) to the DBMS. ...
... (Database) application program: a computer program that interacts with database by issuing an appropriate request (SQL statement) to the DBMS. ...
DB Time-based Oracle Performance Tuning: Theory and
... • Performance improvement for Oracle database means doing the same work in less DB Time ...
... • Performance improvement for Oracle database means doing the same work in less DB Time ...
Database Project
... All SQL Server objects are reflected here All objects within user databases, that is And that are user-created objects (no system objects) ...
... All SQL Server objects are reflected here All objects within user databases, that is And that are user-created objects (no system objects) ...
Relational Algebra - University of Houston
... Cross-product ( ) Allows us to combine two relations. Set-difference ( ) Tuples in reln. 1, but not in reln. 2. Union ( ) Tuples in reln. 1 and in reln. 2. Intersection, join, division, renaming: Not essential, but (very!) useful. ...
... Cross-product ( ) Allows us to combine two relations. Set-difference ( ) Tuples in reln. 1, but not in reln. 2. Union ( ) Tuples in reln. 1 and in reln. 2. Intersection, join, division, renaming: Not essential, but (very!) useful. ...
Data Services - Microsoft Center
... Mike in our team http://www.miketaulty.com ( search Entity or LINQ ) Data Platform Developer Centre http://msdn.microsoft.com/engb/data/default.aspx ...
... Mike in our team http://www.miketaulty.com ( search Entity or LINQ ) Data Platform Developer Centre http://msdn.microsoft.com/engb/data/default.aspx ...
2.2. Hardware Architecture, the Trend to Shared-Nothing
... data through the interconnection network. The shared-nothing design moves only questions and answers through the network. Raw memory accesses and raw disk accesses are performed locally in a processor, and only the filtered (reduced) data is passed to the client program. This allows a more scaleable ...
... data through the interconnection network. The shared-nothing design moves only questions and answers through the network. Raw memory accesses and raw disk accesses are performed locally in a processor, and only the filtered (reduced) data is passed to the client program. This allows a more scaleable ...
Course Review
... These constraints are part of the database Unlike spreadsheet cells, an attribute set of values can only hold data. Sem 1 2002 10 / 23 ...
... These constraints are part of the database Unlike spreadsheet cells, an attribute set of values can only hold data. Sem 1 2002 10 / 23 ...
Clients and Servers
... Few concurrent users Network traffic light If data is read only If data isnt transaction in nature Small companies with limited resources Where skills are in short supply One of software purchase so licensing not an issue ...
... Few concurrent users Network traffic light If data is read only If data isnt transaction in nature Small companies with limited resources Where skills are in short supply One of software purchase so licensing not an issue ...
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.