Introduction to Database System
... Drawback of file system (Cont.) Hard to access unexpected information ...
... Drawback of file system (Cont.) Hard to access unexpected information ...
Oracle Database 10g Performance Overview
... Figure 3: examples of performance improvements with the “CPU+IO” cost model In the first example illustrated in figure 3, a join query is performed on the Sales and Products tables of the Oracle Sample schema. The query checks that the referential integrity constraint between the sales and products ...
... Figure 3: examples of performance improvements with the “CPU+IO” cost model In the first example illustrated in figure 3, a join query is performed on the Sales and Products tables of the Oracle Sample schema. The query checks that the referential integrity constraint between the sales and products ...
An SQL API for Object Oriented Perl
... allow multi-table queries, taking care of joins automatically do not impose their own conventions on table schema allow query values and selections to be overridden allow transparent post-processing of query results provide accessor functions for query results ...
... allow multi-table queries, taking care of joins automatically do not impose their own conventions on table schema allow query values and selections to be overridden allow transparent post-processing of query results provide accessor functions for query results ...
Visual Basic Database Access
... • Command Object: The command object allows us to execute a SQL statement or a stored procedure. • DataReader: It is a read-only and forward-only pointer into a table to retrieve records. • DataSet Object: A DataSet object can hold several tables and relationships between tables. • DataAdapter: This ...
... • Command Object: The command object allows us to execute a SQL statement or a stored procedure. • DataReader: It is a read-only and forward-only pointer into a table to retrieve records. • DataSet Object: A DataSet object can hold several tables and relationships between tables. • DataAdapter: This ...
Database-1 - Angelfire
... Importance of forms. Create the forms with the user interface. Put sufficient control in the forms. Good looking and keep uniforms through out the application. ...
... Importance of forms. Create the forms with the user interface. Put sufficient control in the forms. Good looking and keep uniforms through out the application. ...
Three Main Components
... ArcIMS, Webmap, and Map Guide •GIS Programing: AML, Avenue, Visual Basic ...
... ArcIMS, Webmap, and Map Guide •GIS Programing: AML, Avenue, Visual Basic ...
Creating views on SQL Server Functions and Stored Procedures
... Virtual DataPort allows connecting to databases using JDBC data sources. Once the connection to the database is set base views can be created in VDP. These base views can be created in two ways: ● Importing a database table, function or stored procedure directly from the graphical interface using in ...
... Virtual DataPort allows connecting to databases using JDBC data sources. Once the connection to the database is set base views can be created in VDP. These base views can be created in two ways: ● Importing a database table, function or stored procedure directly from the graphical interface using in ...
Data and Database Administration
... Views Subset of the database that is presented to one or more users User can be given access privilege to view without allowing access privilege to underlying tables Integrity Controls Protect data from unauthorized use Domains – set allowable values Assertions – enforce database condition ...
... Views Subset of the database that is presented to one or more users User can be given access privilege to view without allowing access privilege to underlying tables Integrity Controls Protect data from unauthorized use Domains – set allowable values Assertions – enforce database condition ...
Programming in Oracle with PL/SQL
... – Stored procedures improve the integrity and consistency of your applications. By developing all of your applications around a common group of procedures, you can reduce the likelihood of committing coding errors. – You can test a procedure or function to guarantee that it returns an accurate resul ...
... – Stored procedures improve the integrity and consistency of your applications. By developing all of your applications around a common group of procedures, you can reduce the likelihood of committing coding errors. – You can test a procedure or function to guarantee that it returns an accurate resul ...
ppt - EECS Instructional Support Group Home Page
... – A sequence of reads and writes of database objects. – Unit of work that must commit and abort as a single atomic unit • Transaction Manager controls the execution of transactions. • User program may carry out many operations on the data retrieved from the database, but the DBMS is only concerned a ...
... – A sequence of reads and writes of database objects. – Unit of work that must commit and abort as a single atomic unit • Transaction Manager controls the execution of transactions. • User program may carry out many operations on the data retrieved from the database, but the DBMS is only concerned a ...
Knowledge Management for Database Interoperability
... same real-world objects and concepts being represented in different databases using multitude of data models and user perspectives; (ii.) Database, platform and network level heterogeneity: This occurs due to the use of different DBMSs, networks and platforms at the distributed sites. The heterogene ...
... same real-world objects and concepts being represented in different databases using multitude of data models and user perspectives; (ii.) Database, platform and network level heterogeneity: This occurs due to the use of different DBMSs, networks and platforms at the distributed sites. The heterogene ...
MySQL: Database Design
... PERSON *PersonID Title FirstName MiddleInitial LastName HomeAddress1 HomeAddress2 HomeCountry HomePhoneNo HomeFaxNo EmailAddress Birthday MajorSpecialization OtherSpecialization InstitutionID PositionHeld ...
... PERSON *PersonID Title FirstName MiddleInitial LastName HomeAddress1 HomeAddress2 HomeCountry HomePhoneNo HomeFaxNo EmailAddress Birthday MajorSpecialization OtherSpecialization InstitutionID PositionHeld ...
database system
... • In a list, each row may contain information on more than one theme. As a result, needed information may appear in the lists only if information on other themes is also present – For Example: A list of Projects may include Project Manager information (Name, ID, and Phone Extension) and Project info ...
... • In a list, each row may contain information on more than one theme. As a result, needed information may appear in the lists only if information on other themes is also present – For Example: A list of Projects may include Project Manager information (Name, ID, and Phone Extension) and Project info ...
SIGIR01 - Information retrieval
... • Two main factors determine variation in document scores – Search engine scoring functions. – Collection variations which essentially change the IDF. • Effective score normalization requires – Disregarding databases which are unlikely to have the answer ...
... • Two main factors determine variation in document scores – Search engine scoring functions. – Collection variations which essentially change the IDF. • Effective score normalization requires – Disregarding databases which are unlikely to have the answer ...
Slides - UCLA Computer Science
... OLD AS |
NEW AS new-value-tuple-name |
OLDTABLE AS old-value-table-name |
NEWTABLE AS new-value-table-name
...
... OLD AS
602389-DataWarehousing-QA-2016
... This course provides an introduction to data warehouse design. Topics covered: data modelling, database design and database access are reviewed. Data extraction, cleansing, transformation and loading, data cube computation, materialized view selection, OLAP query processing, star schema, fact tables ...
... This course provides an introduction to data warehouse design. Topics covered: data modelling, database design and database access are reviewed. Data extraction, cleansing, transformation and loading, data cube computation, materialized view selection, OLAP query processing, star schema, fact tables ...
Beginning Java
... cursor pointing to its current row of data. Initially the cursor is positioned before the first row. The next() method moves the cursor to the next row, and because it returns false when there are no more rows in the ResultSet object, it can be used in a while loop to iterate through the result set. ...
... cursor pointing to its current row of data. Initially the cursor is positioned before the first row. The next() method moves the cursor to the next row, and because it returns false when there are no more rows in the ResultSet object, it can be used in a while loop to iterate through the result set. ...
A Database in Every Sensor
... Antelope from a macro perspective in a network environment, demonstrating that having a database in every sensor can result in significant improvements in energy efficiency by reducing the need for continuous data collection. This shows that the use of a database not only has qualitative benefits b ...
... Antelope from a macro perspective in a network environment, demonstrating that having a database in every sensor can result in significant improvements in energy efficiency by reducing the need for continuous data collection. This shows that the use of a database not only has qualitative benefits b ...
How In-Memory Affects Database Design
... inserting the same data...MVCC will let them) –Foreign Key can't reliably be done because: • In Snapshot Isolation Level, the row may have been deleted while you check • In Higher Levels, the transaction will fail if the row has been updated drsql.org ...
... inserting the same data...MVCC will let them) –Foreign Key can't reliably be done because: • In Snapshot Isolation Level, the row may have been deleted while you check • In Higher Levels, the transaction will fail if the row has been updated drsql.org ...
Usage of Multimedia System
... An online real-time system. allowing two or more users to communicate and exchange information and to simultaneously manipulate multimedia documents. Persons at different locations work on same task. All participants see same information. System deals with creating digitized video/voice, data, image ...
... An online real-time system. allowing two or more users to communicate and exchange information and to simultaneously manipulate multimedia documents. Persons at different locations work on same task. All participants see same information. System deals with creating digitized video/voice, data, image ...
No Slide Title
... • Exists when unnecessarily duplicated data are found in the database. • For example, a customer's telephone number may be found in the customer file, in the sales agent file, and in the invoice file. • Data redundancy is symptomatic of a (computer) file system, given its inability to represent and ...
... • Exists when unnecessarily duplicated data are found in the database. • For example, a customer's telephone number may be found in the customer file, in the sales agent file, and in the invoice file. • Data redundancy is symptomatic of a (computer) file system, given its inability to represent and ...
JAVA Database Connectivity (JDBC)
... JAVA Database Connectivity (JDBC) JDBC lets Java programmers connect to a database, query it or update it using SQL. Java and JDBC have an essential advantage over other database programming environments since the programs developed with this technology are platform-independent and vendorindepen ...
... JAVA Database Connectivity (JDBC) JDBC lets Java programmers connect to a database, query it or update it using SQL. Java and JDBC have an essential advantage over other database programming environments since the programs developed with this technology are platform-independent and vendorindepen ...
We have finished the LONG to CLOB conversions in University of
... 6. The conversion is done one table a time and can be done online (or live) without affecting those applications that do not use the table being converted. If you want to do the conversion when applications are live, you need to test it in test database and make sure it works for you. Otherwise, the ...
... 6. The conversion is done one table a time and can be done online (or live) without affecting those applications that do not use the table being converted. If you want to do the conversion when applications are live, you need to test it in test database and make sure it works for you. Otherwise, the ...
Introduction to Patterns
... Hide the operation that creates the instance behind a class operation (getInstance) Variation: Since creation policy is encapsulated in getInstance, possible to vary the creation policy ...
... Hide the operation that creates the instance behind a class operation (getInstance) Variation: Since creation policy is encapsulated in getInstance, possible to vary the creation policy ...
databases and information management
... A relational database organizes data in the form of two-dimensional tables. Illustrated here are tables for the entities SUPPLIER and PART showing how they represent each entity and its attributes. Supplier Number is a primary key for the SUPPLIER table and a foreign key for the PART table. ...
... A relational database organizes data in the form of two-dimensional tables. Illustrated here are tables for the entities SUPPLIER and PART showing how they represent each entity and its attributes. Supplier Number is a primary key for the SUPPLIER table and a foreign key for the PART table. ...
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.