Entity-Relationship Modeling - LSU Computer Science
... First, Let us look at the competing forces in the computer software area at that time. What are the competing forces then? What triggered people like the author to work on this area (data models) and this particular topic (ER modeling)? In the following, we will discuss the competing forces in the i ...
... First, Let us look at the competing forces in the computer software area at that time. What are the competing forces then? What triggered people like the author to work on this area (data models) and this particular topic (ER modeling)? In the following, we will discuss the competing forces in the i ...
Getting started
... Getting started with queries • Our HR/Vantage tutorial covers queries in great detail • Like other topics, it is also covered in your book ...
... Getting started with queries • Our HR/Vantage tutorial covers queries in great detail • Like other topics, it is also covered in your book ...
teps-to-Apply-a-Service-Pack-or-Patch-to-Mirrored
... In this tip, I am going to outline my environment and then walk through the process of patching mirrored servers. My test environment consists of two SQL Server 2005 SP2 servers named SSQL1 (principal) and SSQL2 (mirror) that contain eleven mirrored databases. The database mirroring operating mode i ...
... In this tip, I am going to outline my environment and then walk through the process of patching mirrored servers. My test environment consists of two SQL Server 2005 SP2 servers named SSQL1 (principal) and SSQL2 (mirror) that contain eleven mirrored databases. The database mirroring operating mode i ...
11 - Perl and the DBI module
... unique ID, perhaps by using the “max” function of MySQL. You must use functions and the input should be of the form “first last email”. In this case you have to query for first and last name and email, but generate unique id. If you knew the unique ID you could use was, say, 42, then to insert new d ...
... unique ID, perhaps by using the “max” function of MySQL. You must use functions and the input should be of the form “first last email”. In this case you have to query for first and last name and email, but generate unique id. If you knew the unique ID you could use was, say, 42, then to insert new d ...
Information Retrieval Introduction
... • “Relevance of a doc wrt a search term” is a function that is called once per doc the term appears in (docs found via inv. index): • For efficient fn computation, for each term, we can store the # times it appears in each doc, as well as the # docs it appears in. • Must also sort retrieved docs by ...
... • “Relevance of a doc wrt a search term” is a function that is called once per doc the term appears in (docs found via inv. index): • For efficient fn computation, for each term, we can store the # times it appears in each doc, as well as the # docs it appears in. • Must also sort retrieved docs by ...
SQL: Single Table Queries
... SQL, including the System/38 (announced in 1978 and commercially available in August 1979), SQL/DS (introduced in 1981), and DB2 (in 1983). • At the same time Relational Software, Inc. (now Oracle Corporation) developed their own version of a RDBMS for the Navy, CIA and others. In the summer of 1979 ...
... SQL, including the System/38 (announced in 1978 and commercially available in August 1979), SQL/DS (introduced in 1981), and DB2 (in 1983). • At the same time Relational Software, Inc. (now Oracle Corporation) developed their own version of a RDBMS for the Navy, CIA and others. In the summer of 1979 ...
SELECT Statements in PL/SQL
... Use a naming convention to avoid ambiguity in the WHERE clause. Avoid using database column names as identifiers. Syntax errors can arise because PL/SQL checks the database first for a column in the table. The names of local variables and formal parameters take precedence over the names of database ...
... Use a naming convention to avoid ambiguity in the WHERE clause. Avoid using database column names as identifiers. Syntax errors can arise because PL/SQL checks the database first for a column in the table. The names of local variables and formal parameters take precedence over the names of database ...
CH04
... SQL/CLI permits an application written in one of the usual host languages to issue database requests, not via embedded SQL, but rather by invoking certain vendor-provided routines. Those routines use dynamic SQL to perform the requested database operations on the application’s behalf. Reasons: 1. SQ ...
... SQL/CLI permits an application written in one of the usual host languages to issue database requests, not via embedded SQL, but rather by invoking certain vendor-provided routines. Those routines use dynamic SQL to perform the requested database operations on the application’s behalf. Reasons: 1. SQ ...
Chapter 1: define database: a collection of related data
... - logically coherent collection of data - some inherent meaning - data to be used for a specific purpose define database management system (DBMS): a collection of programs that enables users to create and manitain a database. General purpose software for: - defining: specify data types, structures a ...
... - logically coherent collection of data - some inherent meaning - data to be used for a specific purpose define database management system (DBMS): a collection of programs that enables users to create and manitain a database. General purpose software for: - defining: specify data types, structures a ...
slides - CIS @ Temple University
... temporary relation that holds the result of the query. EXEC SQL close c END_EXEC Note: above details vary with language. For example, the Java embedding defines Java iterators to step through result tuples. ...
... temporary relation that holds the result of the query. EXEC SQL close c END_EXEC Note: above details vary with language. For example, the Java embedding defines Java iterators to step through result tuples. ...
chap09
... Finishing the Data Adapter • When a new data adapter is created using the Data Adapter Configuration Wizard, the Wizard automatically creates action queries based on the data adapter’s SQL query • To configure the data adapter so it does not create action queries, a developer would open the Advance ...
... Finishing the Data Adapter • When a new data adapter is created using the Data Adapter Configuration Wizard, the Wizard automatically creates action queries based on the data adapter’s SQL query • To configure the data adapter so it does not create action queries, a developer would open the Advance ...
Tucker_Intro
... • Your cards are the database and what you have recorded (written) on them is the data. • The entries in the phone book are data. • The information written in your file system is data. ...
... • Your cards are the database and what you have recorded (written) on them is the data. • The entries in the phone book are data. • The information written in your file system is data. ...
Database systems in 21 minutes database: a structured collection of data
... Other statements • generic SQL – ought to be the same for all db systems – (though they are not always) insert into sales values('1234','44','2008-03-06','27.95'); update books set price = 99.99 where author = "Flanagan"; delete from books where author = "Singer"; ...
... Other statements • generic SQL – ought to be the same for all db systems – (though they are not always) insert into sales values('1234','44','2008-03-06','27.95'); update books set price = 99.99 where author = "Flanagan"; delete from books where author = "Singer"; ...
Practical Solution to Assuring Student Preparedness for Advanced
... opportunity to fulfill the prerequisites. • Proposed solution addresses this issue and offers a method which will enable these students to acquire the needed skills prior to beginning the advanced coursework. ...
... opportunity to fulfill the prerequisites. • Proposed solution addresses this issue and offers a method which will enable these students to acquire the needed skills prior to beginning the advanced coursework. ...
Querying DyNet`s patent database
... DYNET - A dynamic, hierarchical perspective on massive relational data ...
... DYNET - A dynamic, hierarchical perspective on massive relational data ...
Slide 1
... • SQL and Btrieve logging • Nearly all database ops can be logged, including failed operations • Before & after images for updates allows detailed change analysis • Log purging and archiving • Multi-version metadata and DDF management ...
... • SQL and Btrieve logging • Nearly all database ops can be logged, including failed operations • Before & after images for updates allows detailed change analysis • Log purging and archiving • Multi-version metadata and DDF management ...
Chapter 1
... – Definition of data was embedded in application programs, rather than being stored separately and independently. – No control over access and manipulation of data beyond that imposed by application programs. ...
... – Definition of data was embedded in application programs, rather than being stored separately and independently. – No control over access and manipulation of data beyond that imposed by application programs. ...
Software Applications - University of Saskatchewan
... Query: finds records that match a specific criteria Sort: ...
... Query: finds records that match a specific criteria Sort: ...
Data Guard Presentation - Personal Web Pages
... monitoring tasks across the multiple databases in a Data Guard configuration. Administrators may use either Oracle Enterprise Manager (Grid Control) or the Broker’s own specialized command-line interface (DGMGRL) to take advantage of this integrated management framework. ...
... monitoring tasks across the multiple databases in a Data Guard configuration. Administrators may use either Oracle Enterprise Manager (Grid Control) or the Broker’s own specialized command-line interface (DGMGRL) to take advantage of this integrated management framework. ...
Chapter 11 Other examples where the CIC DB can
... The VLT architecture includes an online database which provides real-time data capabilities. This database is a home-made product. The main reason is at that time, the performance of writing into a database was too low. So this database can be viewed as a set of files. Each LCU loads the information ...
... The VLT architecture includes an online database which provides real-time data capabilities. This database is a home-made product. The main reason is at that time, the performance of writing into a database was too low. So this database can be viewed as a set of files. Each LCU loads the information ...
Learning Relational Probability Trees
... resulting in overly complex models with excess structure. Excess structure in models is harmful for several reasons. First, such models are factually incorrect, indicating that some variables are related when they are not. Second, such models require more space and computational resources than model ...
... resulting in overly complex models with excess structure. Excess structure in models is harmful for several reasons. First, such models are factually incorrect, indicating that some variables are related when they are not. Second, such models require more space and computational resources than model ...
Vertex Installation ( Step By Step Guide)
... Data Source needs to schema(Appowner). You do not need to put in a Data Source, you can leave this blank. Just type User ID IFSAPP, Password, and database (TEST, for example). Click on CONNECT. Do not click on OK. A database connections dialog box should be displayed indicating that “All Databases w ...
... Data Source needs to schema(Appowner). You do not need to put in a Data Source, you can leave this blank. Just type User ID IFSAPP, Password, and database (TEST, for example). Click on CONNECT. Do not click on OK. A database connections dialog box should be displayed indicating that “All Databases w ...
Ch 1: Your Future and Computer Competency
... – Disadvantage: Cross-referencing across the files is needed for detailed reporting – Benefit: Data duplication is minimized which removes the updation anomalies ...
... – Disadvantage: Cross-referencing across the files is needed for detailed reporting – Benefit: Data duplication is minimized which removes the updation anomalies ...
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.