The SDL Library: Querying a Relational Database with an Ontology, Rules and the Jess Engine
... The most of data processed in modern applications come from relational databases. Such data is described only by their schema (a structure of data). Without strictly defined semantics there is often a mismatching problem with table and column names in databases. Moreover, it is rather difficult to q ...
... The most of data processed in modern applications come from relational databases. Such data is described only by their schema (a structure of data). Without strictly defined semantics there is often a mismatching problem with table and column names in databases. Moreover, it is rather difficult to q ...
Chapter 1
... An Internet database application uses the Internet network; a database application that uses Internet technology may or may not use the Internet network. It may use this technology in the context of an intra-net or even for a personal database application that “publishes” the application to a single ...
... An Internet database application uses the Internet network; a database application that uses Internet technology may or may not use the Internet network. It may use this technology in the context of an intra-net or even for a personal database application that “publishes” the application to a single ...
PL SQl
... They must be created when you are executing a SELECT statement that returns more than one row. Even though the cursor stores multiple records, only one record can be processed at a time, which is called as current row. When you fetch a row the current row position moves to next row. ...
... They must be created when you are executing a SELECT statement that returns more than one row. Even though the cursor stores multiple records, only one record can be processed at a time, which is called as current row. When you fetch a row the current row position moves to next row. ...
Improve query performance with the new SQL Server 2016
... Configure FORCED PARAMETERIZATION for the database, if there are a small number of different query plans in your workload. (When the ratio between the count of distinct query_hash and the total number of entries in sys.query_store_query is much less than 1.) ...
... Configure FORCED PARAMETERIZATION for the database, if there are a small number of different query plans in your workload. (When the ratio between the count of distinct query_hash and the total number of entries in sys.query_store_query is much less than 1.) ...
r – s
... 1. r, s must have the same arity (same number of attributes) 2. The attribute domains must be compatible (e.g., 2nd column of r deals with the same type of values as does the 2nd column of s) E.g. to find all customers with either an account or a loan ...
... 1. r, s must have the same arity (same number of attributes) 2. The attribute domains must be compatible (e.g., 2nd column of r deals with the same type of values as does the 2nd column of s) E.g. to find all customers with either an account or a loan ...
DatalogRA : Datalog with Recursive Aggregation in the Spark RDD
... the result of a rule we take into account which relations where extended in the preceding iteration and what the newly added tuples where. For example, if we have a rule r(x, y) :- s(x, y, z), r(z, 2), r(y, z) and we know that r0 contains the recently added tuples, then we can compute the tuples add ...
... the result of a rule we take into account which relations where extended in the preceding iteration and what the newly added tuples where. For example, if we have a rule r(x, y) :- s(x, y, z), r(z, 2), r(y, z) and we know that r0 contains the recently added tuples, then we can compute the tuples add ...
supervisor, occupational health and welfare services
... Must possess a Bachelors Degree in Computer Science /Information Technology Must be between 22 and 30 years of age Must have: i Oracle database administration ii Proven skills in Network Technologies such as A+, N+, Cisco, Ethernet, TCP/IP and Microsoft Operating Systems required on this job A ...
... Must possess a Bachelors Degree in Computer Science /Information Technology Must be between 22 and 30 years of age Must have: i Oracle database administration ii Proven skills in Network Technologies such as A+, N+, Cisco, Ethernet, TCP/IP and Microsoft Operating Systems required on this job A ...
- Courses - University of California, Berkeley
... explicit operations (select, project, join, etc) that can be used to build some desired relation from the database. • Relational Calculus provides a notation for formulating the definition of that desired relation in terms of the relations in the database without explicitly stating the operations to ...
... explicit operations (select, project, join, etc) that can be used to build some desired relation from the database. • Relational Calculus provides a notation for formulating the definition of that desired relation in terms of the relations in the database without explicitly stating the operations to ...
McAfee Security Scanner for Databases Data Sheet
... of Oracle, Microsoft SQL Server, IBM DB2, and MySQL databases, McAfee Security Scanner for Databases provides an optimal, comprehensive assessment, evaluating risk from virtually all known threat vectors. This information can then be used to demonstrate compliance for audit purposes and to improve o ...
... of Oracle, Microsoft SQL Server, IBM DB2, and MySQL databases, McAfee Security Scanner for Databases provides an optimal, comprehensive assessment, evaluating risk from virtually all known threat vectors. This information can then be used to demonstrate compliance for audit purposes and to improve o ...
slides - IIT Bombay
... •identity of word •ends in “-ski” •is capitalized •is part of a noun phrase? •is under node X in WordNet •is in bold font •is indented •next two words are “and Associates” •previous label is “Other” ...
... •identity of word •ends in “-ski” •is capitalized •is part of a noun phrase? •is under node X in WordNet •is in bold font •is indented •next two words are “and Associates” •previous label is “Other” ...
Worksheets52-56
... index by author, by subject and so on; it is possible to order the data, do searches and quickly retrieve the desired information even when using more than one search criteria (for example, not only all the books printed in 2001 but all the books printed in 2001 that have more than 200 pages and tha ...
... index by author, by subject and so on; it is possible to order the data, do searches and quickly retrieve the desired information even when using more than one search criteria (for example, not only all the books printed in 2001 but all the books printed in 2001 that have more than 200 pages and tha ...
using openaccess sdk to expose erp data
... the execution of the query against the data source. End users query the data sources as if they were a single database using SQL through ODBC, OLE DB or JDBC. Queries are parsed and executed against each of the data sources in real-time and then the results are combined into a single result set and ...
... the execution of the query against the data source. End users query the data sources as if they were a single database using SQL through ODBC, OLE DB or JDBC. Queries are parsed and executed against each of the data sources in real-time and then the results are combined into a single result set and ...
TrustedDB A Trusted Hardware based Database with Privacy and
... inherently limit query expressiveness. Here, we introduce TrustedDB, an outsourced database prototype that allows clients to execute SQL queries with privacy and under regulatory compliance constraints by leveraging server-hosted, tamper-proof trusted hardware in critical query processing stages, th ...
... inherently limit query expressiveness. Here, we introduce TrustedDB, an outsourced database prototype that allows clients to execute SQL queries with privacy and under regulatory compliance constraints by leveraging server-hosted, tamper-proof trusted hardware in critical query processing stages, th ...
Computer revision sheet (Sec.2) – (First term)
... (29) ------------------Relationship between two tables means that it can record the first table to be associated with only one record of the table second (One to one - one to many - many to many - All of the above) (30).......... Is an outsider field on the table because it is not of the nature of t ...
... (29) ------------------Relationship between two tables means that it can record the first table to be associated with only one record of the table second (One to one - one to many - many to many - All of the above) (30).......... Is an outsider field on the table because it is not of the nature of t ...
Mobule 12 - Distributed Databases
... database to various locations on the network. The distributed database is centrally administered but provides flexibility and customization for user. The network needs to be able to handle various amounts of database traffic between database locations and user applications. ...
... database to various locations on the network. The distributed database is centrally administered but provides flexibility and customization for user. The network needs to be able to handle various amounts of database traffic between database locations and user applications. ...
chapter 3 - Central Washington University
... Many applications today and in the future will require databases that can store and retrieve not only structured numbers and characters but also drawings, images, photographs, voice, and full-motion video. Stores data & procedures as objects. Conventional DBMSs are not well suited to handling ...
... Many applications today and in the future will require databases that can store and retrieve not only structured numbers and characters but also drawings, images, photographs, voice, and full-motion video. Stores data & procedures as objects. Conventional DBMSs are not well suited to handling ...
CellStore - the Vision of Pure Object Database
... – object memory management supporting only common object model as described in section 3.1 – dumb, built-in interpreter which is capable if interpreting simple, limited language (bytecode) – we called it the bootstrap interpreter – capability of trap out unknown language (bytecode) and let user-leve ...
... – object memory management supporting only common object model as described in section 3.1 – dumb, built-in interpreter which is capable if interpreting simple, limited language (bytecode) – we called it the bootstrap interpreter – capability of trap out unknown language (bytecode) and let user-leve ...
Site Development Foundations
... Record -- one row of a relational database table Field -- one column of a relational database table Entity (i.e., record) -- a person, place or thing represented in a database table row Attribute -- a category of information related to an entity Linking attribute -- common attribute between tables t ...
... Record -- one row of a relational database table Field -- one column of a relational database table Entity (i.e., record) -- a person, place or thing represented in a database table row Attribute -- a category of information related to an entity Linking attribute -- common attribute between tables t ...
Lecture 1 : Introduction
... • A client program may connect to several DBMSs. • Other variations of clients are possible: • e.g., in some DBMSs, more functionality is transferred to clients including data dictionary functions, optimization and recovery across multiple servers, etc. • In such situations the server may be called ...
... • A client program may connect to several DBMSs. • Other variations of clients are possible: • e.g., in some DBMSs, more functionality is transferred to clients including data dictionary functions, optimization and recovery across multiple servers, etc. • In such situations the server may be called ...
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Chapter1[1]
... A DBMS is normally bought as a ready made package DBMSs vary in cost depending on a number of issues, such as level of security provided, level of support, supporting tools for application development, Internet functions, speed of storage and retrieval, etc. A DBMS may be stand alone or multi- ...
... A DBMS is normally bought as a ready made package DBMSs vary in cost depending on a number of issues, such as level of security provided, level of support, supporting tools for application development, Internet functions, speed of storage and retrieval, etc. A DBMS may be stand alone or multi- ...
Narration Script: Slide 1: Oracle Database 11g Express Edition
... Sequences: Sequences are schema objects that generate unique sequential values, which are very useful when you need unique primary keys. Synonyms: A synonym is an alias for another schema object. Some reasons to use synonyms are security (for example, to hide the owner and location of an object) and ...
... Sequences: Sequences are schema objects that generate unique sequential values, which are very useful when you need unique primary keys. Synonyms: A synonym is an alias for another schema object. Some reasons to use synonyms are security (for example, to hide the owner and location of an object) and ...
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.