rdb2rdf_sssw11 - Department of Computer Science
... • Need to query RDB with SPARQL • Translate SPARQL to SQL – Comparing the overall performance […] of the fastest rewriter with the fastest relational database shows an overhead for query rewriting of 106%. This is an indicator that there is still room for improving the rewriting algorithms [Bizer an ...
... • Need to query RDB with SPARQL • Translate SPARQL to SQL – Comparing the overall performance […] of the fastest rewriter with the fastest relational database shows an overhead for query rewriting of 106%. This is an indicator that there is still room for improving the rewriting algorithms [Bizer an ...
HP_Angle_Light_16x9_Blue
... Provide information in real time • NonStop SQL has industry’s most elegant mixed workload handling • NonStop SQL engine executes concurrent database updates, queries and batch operations ...
... Provide information in real time • NonStop SQL has industry’s most elegant mixed workload handling • NonStop SQL engine executes concurrent database updates, queries and batch operations ...
Keyword Searching and Browsing in Databases using BANKS 1
... With the growth of the World Wide Web, there has been a rapid increase in the number of users who need to access online databases without having a detailed knowledge of schema or query languages; even relatively simple query languages designed for non-experts are too complicated for such users. Quer ...
... With the growth of the World Wide Web, there has been a rapid increase in the number of users who need to access online databases without having a detailed knowledge of schema or query languages; even relatively simple query languages designed for non-experts are too complicated for such users. Quer ...
Additional paper Ontologies of developmental anatomy: Their
... topic and a set of relationships that hold among the terms in that vocabulary.'2 This de®nition highlights the key property of ontologies that distinguishes an ontology from a simple list of items: that there are formal rules that de®ne the relationships among the `terms' enabling, for example, hier ...
... topic and a set of relationships that hold among the terms in that vocabulary.'2 This de®nition highlights the key property of ontologies that distinguishes an ontology from a simple list of items: that there are formal rules that de®ne the relationships among the `terms' enabling, for example, hier ...
literature survey
... without computing its results. These methods usually use the statistical properties to measure ambiguity or term-relatedness of the query to predict its difficultness. Examples like average document frequency of the query terms or the number of documents which contain atleast one query term. These m ...
... without computing its results. These methods usually use the statistical properties to measure ambiguity or term-relatedness of the query to predict its difficultness. Examples like average document frequency of the query terms or the number of documents which contain atleast one query term. These m ...
10. STRUCTURED QUERY LANGUAGE
... Structured Query Language (SQL) is a computer language for communication and interaction with databases and was created to be a cross-platform syntax to extract and manipulate data from disparate database systems. So in theory the same SQL queries written for an Oracle database will work on a Sybase ...
... Structured Query Language (SQL) is a computer language for communication and interaction with databases and was created to be a cross-platform syntax to extract and manipulate data from disparate database systems. So in theory the same SQL queries written for an Oracle database will work on a Sybase ...
Backup & Recovery with RMAN
... – RMAN on-line backups are not so heavy for the system as manual on-line backups – RMAN can detect corrupted blocks – RMAN automatically track database structure changes – Provides easy, automated backup, restore and recovery operations – Keeps invenotory of taken backups – Can seamlessly work with ...
... – RMAN on-line backups are not so heavy for the system as manual on-line backups – RMAN can detect corrupted blocks – RMAN automatically track database structure changes – Provides easy, automated backup, restore and recovery operations – Keeps invenotory of taken backups – Can seamlessly work with ...
How In-Memory Affects Database Design
... • With in-memory code, we have to implement in stored procedures –Uniqueness on > 1 column set suffers from timing (If N connections are inserting the same data...MVCC will let them) * –Foreign Key type checks can't reliably be done because: * • In Snapshot Isolation Level, the row may have been del ...
... • With in-memory code, we have to implement in stored procedures –Uniqueness on > 1 column set suffers from timing (If N connections are inserting the same data...MVCC will let them) * –Foreign Key type checks can't reliably be done because: * • In Snapshot Isolation Level, the row may have been del ...
Backup & Recovery with RMAN - Indico
... – RMAN on-line backups are not so heavy for the system as manual on-line backups – RMAN can detect corrupted blocks – RMAN automatically track database structure changes – Provides easy, automated backup, restore and recovery operations – Keeps invenotory of taken backups – Can seamlessly work with ...
... – RMAN on-line backups are not so heavy for the system as manual on-line backups – RMAN can detect corrupted blocks – RMAN automatically track database structure changes – Provides easy, automated backup, restore and recovery operations – Keeps invenotory of taken backups – Can seamlessly work with ...
stars - Department of Computer Science and Information Systems
... However, larger-scale applications may need to integrate information from several databases, possibly supporting different data models To integrate information stored in such heterogeneous databases it is necessary to form a single, integrated schema Conflicts may existing between the various ...
... However, larger-scale applications may need to integrate information from several databases, possibly supporting different data models To integrate information stored in such heterogeneous databases it is necessary to form a single, integrated schema Conflicts may existing between the various ...
And all of a sudden: Main Memory Is Less Expensive Than Disk
... benchmarks by Intel have shown that such a system achieves a bandwidth of up to ∼246 GB/s for the STREAM Triad Benchmark1 . Any bandwidth exceeding the maximum of 246 GB/s requires a multi-node setup to scale. We assume that the memory size has to be at least a factor of two larger than the data set ...
... benchmarks by Intel have shown that such a system achieves a bandwidth of up to ∼246 GB/s for the STREAM Triad Benchmark1 . Any bandwidth exceeding the maximum of 246 GB/s requires a multi-node setup to scale. We assume that the memory size has to be at least a factor of two larger than the data set ...
Access versus Excel - Center
... organization. Although these may include important data center applications, other applications may be managed in the individual department. Department level applications are usually created by professional developers and maintained by dedicated personnel. They often use or pass data into the data c ...
... organization. Although these may include important data center applications, other applications may be managed in the individual department. Department level applications are usually created by professional developers and maintained by dedicated personnel. They often use or pass data into the data c ...
Ingres/Data Dictionary/Integrity
... Functional Dependency (constraints between determinants and attributes. For each value of the determinant there is only one value for each of the attributes it determines) ...
... Functional Dependency (constraints between determinants and attributes. For each value of the determinant there is only one value for each of the attributes it determines) ...
SAS and Relational Databases: What You Must Know
... The structure of the data you would query will probably be drastically different as well. It’s not uncommon for datasets to have the information you need in just one or two sources. This is unlikely with an RBMS – you will probably have to connect many tables to get the same information. For example ...
... The structure of the data you would query will probably be drastically different as well. It’s not uncommon for datasets to have the information you need in just one or two sources. This is unlikely with an RBMS – you will probably have to connect many tables to get the same information. For example ...
Relational Data Model - Department Of Computer Science
... Often a good match for the way we think about our data. Abstract model that underlies SQL, the most important language in DBMS’s today. But SQL uses “bags” while the abstract relational model is set-oriented. Jeffrey Ullman ...
... Often a good match for the way we think about our data. Abstract model that underlies SQL, the most important language in DBMS’s today. But SQL uses “bags” while the abstract relational model is set-oriented. Jeffrey Ullman ...
Creating Stored Procedures and Functions
... Until this point, anonymous blocks are the only examples of PL/SQL code covered in this course. As the name indicates, anonymous blocks are unnamed executable PL/SQL blocks. Because they are unnamed, they can be neither reused nor stored for later use. Procedures and functions are named PL/SQL block ...
... Until this point, anonymous blocks are the only examples of PL/SQL code covered in this course. As the name indicates, anonymous blocks are unnamed executable PL/SQL blocks. Because they are unnamed, they can be neither reused nor stored for later use. Procedures and functions are named PL/SQL block ...
Database Management Systems SNS COLLEGE OF TECHNOLOGY
... d. None of above Answer: A 31. The advantage of computerized database over manual database is a. We can get the information our quick b. We can put in information quick c. Solve the repeated information and consistency problem d. All of above Answer: D 32. Circular button with Office icon in it is a ...
... d. None of above Answer: A 31. The advantage of computerized database over manual database is a. We can get the information our quick b. We can put in information quick c. Solve the repeated information and consistency problem d. All of above Answer: D 32. Circular button with Office icon in it is a ...
Xml and Relational Databases
... What is an XML Database? Simply a database that stores XML Documents There are two major types of XML databases: XML-enabled: These map all XML to a traditional database (such as a relational database), accepting XML as input and rendering XML as ...
... What is an XML Database? Simply a database that stores XML Documents There are two major types of XML databases: XML-enabled: These map all XML to a traditional database (such as a relational database), accepting XML as input and rendering XML as ...
Consistency Constraints in Database Middleware
... ❐ needs of applications using the data restricted by the constraint. Data source capabilities determine the possibilities for checking constraints and reacting to inconsistencies. With regard to checking, the spectrum is defined by the following capabilities: (1) the data source is able to notify th ...
... ❐ needs of applications using the data restricted by the constraint. Data source capabilities determine the possibilities for checking constraints and reacting to inconsistencies. With regard to checking, the spectrum is defined by the following capabilities: (1) the data source is able to notify th ...
Introduction to XML
... DriverManager.registerDriver(new oracle.jdbc.driver.OracleDriver()); conn = DriverManager.getConnection(conStr,”username”,”passwd"); Statement cursor = conn.createStatement(); // Connection Est. ResultSet rset = stmt.executeQuery(“Select* from table_name”); ...
... DriverManager.registerDriver(new oracle.jdbc.driver.OracleDriver()); conn = DriverManager.getConnection(conStr,”username”,”passwd"); Statement cursor = conn.createStatement(); // Connection Est. ResultSet rset = stmt.executeQuery(“Select* from table_name”); ...