Volcano/spl minus/an extensible and parallel query evaluation
... how query processing is really done in commercial database products. For example, using temporary files to transfer data from one operation to the next as suggested in most textbooks has a substantial performance penalty, and is therefore used in neither real database systems nor in Volcano. Finally ...
... how query processing is really done in commercial database products. For example, using temporary files to transfer data from one operation to the next as suggested in most textbooks has a substantial performance penalty, and is therefore used in neither real database systems nor in Volcano. Finally ...
Semantically Correct Query Answers in the Presence of Null Values
... In IBM DB2, this database is accepted as consistent. The null values in columns Term and Times are not relevant to check the satisfaction of the constraints. In order to check the constraint the only attributes that we need to pay attention to are ID and Code. If null is in the one of these attribut ...
... In IBM DB2, this database is accepted as consistent. The null values in columns Term and Times are not relevant to check the satisfaction of the constraints. In order to check the constraint the only attributes that we need to pay attention to are ID and Code. If null is in the one of these attribut ...
PDF - Microsoft Docs
... data scientist can use the ScaleR APIs that are provided as part of R Services (In-Database). The RevoScaleR package contains implementations of some of the most popular R functions, redesigned to provide parallelism and scale. The package also includes functions that further boost performance and s ...
... data scientist can use the ScaleR APIs that are provided as part of R Services (In-Database). The RevoScaleR package contains implementations of some of the most popular R functions, redesigned to provide parallelism and scale. The package also includes functions that further boost performance and s ...
SETL An ETL Tool
... ● No ETL tool available at UCSC DWH. No budget for tool. Coding by hand seemed required. ● UCPath project undergoing significant changes and growth (120+ tables 2012, 250 tables 2016) ● Tracking changes time-consuming and error prone if coding by hand. ● SETL “Simple ETL” architecture and tools prop ...
... ● No ETL tool available at UCSC DWH. No budget for tool. Coding by hand seemed required. ● UCPath project undergoing significant changes and growth (120+ tables 2012, 250 tables 2016) ● Tracking changes time-consuming and error prone if coding by hand. ● SETL “Simple ETL” architecture and tools prop ...
Database Configuration - L-Soft
... If you plan to create a new Oracle database for sole use by the Maestro User Interface, start with creating a new database that uses UTF-8 as its database character set. Note that the database character set UTF-8 is required and that the Maestro User Interface will not work with a database that has ...
... If you plan to create a new Oracle database for sole use by the Maestro User Interface, start with creating a new database that uses UTF-8 as its database character set. Note that the database character set UTF-8 is required and that the Maestro User Interface will not work with a database that has ...
Query Optimization
... The rest of the chapter is organized as follows. Section 2 presents a modular architecture for a query optimizer and describes the role of each module in it. Section 3 analyzes the choices that exist in the shapes of relational query access plans, and the restrictions usually imposed by current opti ...
... The rest of the chapter is organized as follows. Section 2 presents a modular architecture for a query optimizer and describes the role of each module in it. Section 3 analyzes the choices that exist in the shapes of relational query access plans, and the restrictions usually imposed by current opti ...
Oracle Database Licensing Information
... parties. Oracle is not responsible for the availability of, or any content provided on, third-party Web sites. You bear all risks associated with the use of such content. If you choose to purchase any products or services from a third party, the relationship is directly between you and the third par ...
... parties. Oracle is not responsible for the availability of, or any content provided on, third-party Web sites. You bear all risks associated with the use of such content. If you choose to purchase any products or services from a third party, the relationship is directly between you and the third par ...
Query Formulation from High-level Concepts for Relational Databases
... carried out with the user using a dialogue tree to determine what additional attributes the user is interested in. It has been a dicult problem to formulate complex queries. In SQL, complex queries contain subqueries or the \HAVING" clause. Only when the query tools can support complex queries, wil ...
... carried out with the user using a dialogue tree to determine what additional attributes the user is interested in. It has been a dicult problem to formulate complex queries. In SQL, complex queries contain subqueries or the \HAVING" clause. Only when the query tools can support complex queries, wil ...
Chapter>>
... nonvolatile storage. Without the ability to control the timing of write operations to non-volatile storage, recovery is not possible. Force writing means that the DBMS, not the operating system, controls when data are written to nonvolatile storage. 20. What kind of redundant data is stored in a log ...
... nonvolatile storage. Without the ability to control the timing of write operations to non-volatile storage, recovery is not possible. Force writing means that the DBMS, not the operating system, controls when data are written to nonvolatile storage. 20. What kind of redundant data is stored in a log ...
Oracle Rdb™ SQL Reference Manual Volume 1
... The Programs (which include both the software and documentation) contain proprietary information of Oracle Corporation; they are provided under a license agreement containing restrictions on use and disclosure and are also protected by copyright, patent and other intellectual and industrial property ...
... The Programs (which include both the software and documentation) contain proprietary information of Oracle Corporation; they are provided under a license agreement containing restrictions on use and disclosure and are also protected by copyright, patent and other intellectual and industrial property ...
Oracle Database Performance Tuning Guide
... The Programs are not intended for use in any nuclear, aviation, mass transit, medical, or other inherently dangerous applications. It shall be the licensee's responsibility to take all appropriate fail-safe, backup, redundancy and other measures to ensure the safe use of such applications if the Pro ...
... The Programs are not intended for use in any nuclear, aviation, mass transit, medical, or other inherently dangerous applications. It shall be the licensee's responsibility to take all appropriate fail-safe, backup, redundancy and other measures to ensure the safe use of such applications if the Pro ...
Lesson, Module, or Course Title>
... A cache hit occurs only when certain conditions are met, such as the following: • Query WHERE clause constraints need to be equivalent to the cached results or to a subset of the results. • All the columns in the SELECT list of a new query must exist in the cached query or they must be able to be ca ...
... A cache hit occurs only when certain conditions are met, such as the following: • Query WHERE clause constraints need to be equivalent to the cached results or to a subset of the results. • All the columns in the SELECT list of a new query must exist in the cached query or they must be able to be ca ...
to (English)
... If only left-deep trees are considered, time complexity of finding best join order is O(n 2n) Space complexity remains at O(2n) Cost-based optimization is expensive, but worthwhile for queries on ...
... If only left-deep trees are considered, time complexity of finding best join order is O(n 2n) Space complexity remains at O(2n) Cost-based optimization is expensive, but worthwhile for queries on ...
A,r - NYU Computer Science
... If only left-deep trees are considered, time complexity of finding best join order is O(n 2n) Space complexity remains at O(2n) Cost-based optimization is expensive, but worthwhile for queries on ...
... If only left-deep trees are considered, time complexity of finding best join order is O(n 2n) Space complexity remains at O(2n) Cost-based optimization is expensive, but worthwhile for queries on ...
2-QueryOptimization
... If only left-deep trees are considered, time complexity of finding best join order is O(n 2n) Space complexity remains at O(2n) Cost-based optimization is expensive, but worthwhile for queries on ...
... If only left-deep trees are considered, time complexity of finding best join order is O(n 2n) Space complexity remains at O(2n) Cost-based optimization is expensive, but worthwhile for queries on ...
Efficient Prediction of Difficult Keyword Queries over Databases
... Mittendorf has shown that if a text retrieval method effectively ranks the answers to a query in a collection of text documents, it will also perform well for that query over the version of the collection that contains some errors such as repeated terms [28]. In other words, the degree of the diffic ...
... Mittendorf has shown that if a text retrieval method effectively ranks the answers to a query in a collection of text documents, it will also perform well for that query over the version of the collection that contains some errors such as repeated terms [28]. In other words, the degree of the diffic ...
Middleware-based Database Replication: The Gaps
... trailing updates are applied serially at the slave, whereas the master processes them in parallel. The “solution” is usually to slow down the master (during normal operation) so as to keep the slave synchronized to within a small time window. WAN replication is the gold standard for sustaining avail ...
... trailing updates are applied serially at the slave, whereas the master processes them in parallel. The “solution” is usually to slow down the master (during normal operation) so as to keep the slave synchronized to within a small time window. WAN replication is the gold standard for sustaining avail ...
SQL2014 and Azure xStore Integration
... secured in the SQL Server built-in security repository in the master system database. The File Control Layer contains a new object called XFCB, which is the Windows Azure extension to the file control block (FCB) used to manage I/O against each single SQL Server data or log file on the NTFS file sys ...
... secured in the SQL Server built-in security repository in the master system database. The File Control Layer contains a new object called XFCB, which is the Windows Azure extension to the file control block (FCB) used to manage I/O against each single SQL Server data or log file on the NTFS file sys ...
