Overview - University of Virginia, Department of Computer Science
... Idea: If an action of Ti (say, writing X) affects Tj (which perhaps reads X), one of them, say Ti, will obtain the lock on X first and Tj is forced to wait until Ti completes; this effectively orders the transactions. What if Tj already has a lock on Y and Ti later requests a lock on Y? What is it c ...
... Idea: If an action of Ti (say, writing X) affects Tj (which perhaps reads X), one of them, say Ti, will obtain the lock on X first and Tj is forced to wait until Ti completes; this effectively orders the transactions. What if Tj already has a lock on Y and Ti later requests a lock on Y? What is it c ...
Exercise 02: Introduction to Relational Databases (Entity and
... least the questions should be there. Note: MySQL comments can be done with /* */ for multiline-comments (as in Java), or with – (yes, two dashes) for single line comments. Java uses // for single line comments. ...
... least the questions should be there. Note: MySQL comments can be done with /* */ for multiline-comments (as in Java), or with – (yes, two dashes) for single line comments. Java uses // for single line comments. ...
Geodatabases
... Shekhar, Shashi and Chawla, Sanjay. Spatial Databases A Tour. Prentice Hall, 2003 Shekhar, Shashi and Chawla, Sanjay. “Chapter 2: Spatial Concepts and Data Models.” Slides for Spatial Databases: A Tour. Nov. 27, 2009.
Güting, Ralf Hartmut. “An Introduction ...
... Shekhar, Shashi and Chawla, Sanjay. Spatial Databases A Tour. Prentice Hall, 2003 Shekhar, Shashi and Chawla, Sanjay. “Chapter 2: Spatial Concepts and Data Models.” Slides for Spatial Databases: A Tour. Nov. 27, 2009
Security - Gordon A. Russell
... Facilities offered by DBMSs vary. All DBMSs should provide the following advantages over conventional systems: ...
... Facilities offered by DBMSs vary. All DBMSs should provide the following advantages over conventional systems: ...
4/24 Object-Oriented Databases
... “structured” - content & role of that content markup - identify structures “meta language for describing markup languages” ...
... “structured” - content & role of that content markup - identify structures “meta language for describing markup languages” ...
Database Users
... without changing the logical schema Applications depend on the logical schema In general, the interfaces between the various levels and components should be well defined so that changes in some parts do not seriously influence others. ...
... without changing the logical schema Applications depend on the logical schema In general, the interfaces between the various levels and components should be well defined so that changes in some parts do not seriously influence others. ...
presentation source
... Performance must equal/exceed relational equivalents Design amenable to future plans w.r.t. type evolution Structured types must be supported in columns (someday) Localize initial changes to query compiler where possible ...
... Performance must equal/exceed relational equivalents Design amenable to future plans w.r.t. type evolution Structured types must be supported in columns (someday) Localize initial changes to query compiler where possible ...
Database Planning - Binus Repository
... Process of constructing a model of the information used in an enterprise based on a specific data model (e.g. relational), but independent of a particular DBMS and other ...
... Process of constructing a model of the information used in an enterprise based on a specific data model (e.g. relational), but independent of a particular DBMS and other ...
Introduction to SQL - Community College of Philadelphia
... SQL stands for Structured Query Language. According to Oracle Corporation, SQL is “The standardized relational database language for querying, manipulating, and updating information in a relational database.“ The first standardized version of SQL was approved by ANSI in 1986, and an international st ...
... SQL stands for Structured Query Language. According to Oracle Corporation, SQL is “The standardized relational database language for querying, manipulating, and updating information in a relational database.“ The first standardized version of SQL was approved by ANSI in 1986, and an international st ...
Don't Bring a Spreadsheet to a Database Fight: Case for Microsoft Access
... when it is actually updated. At that moment values can be checked and based on the results, changes can be cancelled, users can be prompted to confirm the changes, or other values can be changed as a result of the update. The possibilities for what one can accomplish using events and associated acti ...
... when it is actually updated. At that moment values can be checked and based on the results, changes can be cancelled, users can be prompted to confirm the changes, or other values can be changed as a result of the update. The possibilities for what one can accomplish using events and associated acti ...
Syllabus - SCRIET Library
... Business analysis. Reporting & query tools & application on line analytical processing (OLAP) . Patterns & model. Statistics. Artificial intelligence. Unit-IV Data mining .Introduction to data mining. Decision tress. Neural networks. Nearest neighbor & ...
... Business analysis. Reporting & query tools & application on line analytical processing (OLAP) . Patterns & model. Statistics. Artificial intelligence. Unit-IV Data mining .Introduction to data mining. Decision tress. Neural networks. Nearest neighbor & ...
Análisis de Sets de Productos – 4 Ases
... To enter data in Excel, you can either type it in or import it from different sources. It’s easy to import data from a standard .CSV format, but what about importing it from a database? You can directly run SQL queries on a database from Excel. The traditional method was to create a Macro and write ...
... To enter data in Excel, you can either type it in or import it from different sources. It’s easy to import data from a standard .CSV format, but what about importing it from a database? You can directly run SQL queries on a database from Excel. The traditional method was to create a Macro and write ...
PDF Presentation Slides
... X.com Privacy Policy : X.com vendors cannot access detailed information about customer’s orders, but can get statistic data about them. ...
... X.com Privacy Policy : X.com vendors cannot access detailed information about customer’s orders, but can get statistic data about them. ...
A Closer Look
... obtained, not how it is to be achieved (e.g., how to access data, the order of operations) • Due to declarativity of SQL, DBMS determines evaluation strategy – This greatly simplifies application programs – But DBMS is not infallible: programmers should have an idea of strategies used by DBMS so the ...
... obtained, not how it is to be achieved (e.g., how to access data, the order of operations) • Due to declarativity of SQL, DBMS determines evaluation strategy – This greatly simplifies application programs – But DBMS is not infallible: programmers should have an idea of strategies used by DBMS so the ...
Moving Objects Databases - Worcester Polytechnic Institute
... Observe that the above procedure does not use indexing of the dynamic attributes. In other words, the results of Q1 and Q2 are are examined in their entirety. If indexing on the dynamic attributes is available, then we can modify the above procedure as follows. Instead of evaluating the atoms p and ...
... Observe that the above procedure does not use indexing of the dynamic attributes. In other words, the results of Q1 and Q2 are are examined in their entirety. If indexing on the dynamic attributes is available, then we can modify the above procedure as follows. Instead of evaluating the atoms p and ...
UNDERSTANDING DATABASE DESIGN for Beginners
... dependent on the full primary key. • An logical entity (or physical table) is in third normal form if it is already in second normal form and if the values of all non-primary key attributes are not dependent on other non-primary key attributes . GLOBEX INFOTEK ...
... dependent on the full primary key. • An logical entity (or physical table) is in third normal form if it is already in second normal form and if the values of all non-primary key attributes are not dependent on other non-primary key attributes . GLOBEX INFOTEK ...
Slide Show The Effective Database
... Query – a database object that requests information from a database and creates a dataset (list of selected records) matching the requested information Query Design View – a window that allows one to choose the fields in a query, to sort, and to set criteria. Query Design Grid – the lower half ...
... Query – a database object that requests information from a database and creates a dataset (list of selected records) matching the requested information Query Design View – a window that allows one to choose the fields in a query, to sort, and to set criteria. Query Design Grid – the lower half ...
Reliability and Security in Database Servers
... Reapply all changes of the committed transactions in same order they were originally committed. Pre-requisite: System must have a redo log, which maintains all committed changes in order. ...
... Reapply all changes of the committed transactions in same order they were originally committed. Pre-requisite: System must have a redo log, which maintains all committed changes in order. ...
Severance-SI502-W09-Week14
... By removing the replicated data and replacing it with references to a single copy of each bit of data we build a “web” of information that the relational database can read through very quickly - even for very large amounts of data Often when you want some data it comes from a number of tables linked ...
... By removing the replicated data and replacing it with references to a single copy of each bit of data we build a “web” of information that the relational database can read through very quickly - even for very large amounts of data Often when you want some data it comes from a number of tables linked ...
Presentation
... Hibernate • powerful, ultra-high performance object/relational persistence and query service for Java • uses HDLCA (Hibernate DualLayer Cache Architecture) • two levels of cache • Session level- serves one client or session at one time • JVM level- works on a global basis (for different sessions us ...
... Hibernate • powerful, ultra-high performance object/relational persistence and query service for Java • uses HDLCA (Hibernate DualLayer Cache Architecture) • two levels of cache • Session level- serves one client or session at one time • JVM level- works on a global basis (for different sessions us ...
From Feb 2008 – Sept 2009.
... WR Hambrecht + Co is an investment bank committed to using technology and auction processes to provide open and fair access to financial markets for its clients.WR Hambrecht + Co is headquartered in San Francisco with offices in Boston, Chicago, London, Montreal, New York, Philadelphia and Stamford, ...
... WR Hambrecht + Co is an investment bank committed to using technology and auction processes to provide open and fair access to financial markets for its clients.WR Hambrecht + Co is headquartered in San Francisco with offices in Boston, Chicago, London, Montreal, New York, Philadelphia and Stamford, ...
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.