No Bits Left Behind - MIT Database Group
... hot data. We show that the performance benefit we obtain on a substantial class of queries from the actual Wikipedia workload can be orders of magnitude higher, and that this technique can be implemented in a way that doesn’t change index APIs or increase system complexity. 2. A technique to deal wi ...
... hot data. We show that the performance benefit we obtain on a substantial class of queries from the actual Wikipedia workload can be orders of magnitude higher, and that this technique can be implemented in a way that doesn’t change index APIs or increase system complexity. 2. A technique to deal wi ...
On Improving User Response Times in Tableau
... predicates, potentially large or formulated in different equivalent ways, and by post-processing capabilities. The latter includes rollup, filtering, calculation projection, and column restriction. It is worth noting that certain operations cannot be performed locally, in particular, if they involve ...
... predicates, potentially large or formulated in different equivalent ways, and by post-processing capabilities. The latter includes rollup, filtering, calculation projection, and column restriction. It is worth noting that certain operations cannot be performed locally, in particular, if they involve ...
TrendsInDB_s
... of flat relational data Two-way view: query and update Multiple access mechanisms (HTTP, ADO, ADO.NET, SOAP) Middle tier and Server side XML: extensible, platform independent format for your data ...
... of flat relational data Two-way view: query and update Multiple access mechanisms (HTTP, ADO, ADO.NET, SOAP) Middle tier and Server side XML: extensible, platform independent format for your data ...
Chapter A: Network Model
... For queries in which a field value must be matched with a specified range of ...
... For queries in which a field value must be matched with a specified range of ...
No Bits Left Behind
... average hit rate after 100k lookups and the x-axis is the percentage of the items that the cache can hold (which will vary depending on the tuple size and index fill factor). We compare Swap, which simulates a read-only workload that does not overwrite the index cache (constant cache size), and Shri ...
... average hit rate after 100k lookups and the x-axis is the percentage of the items that the cache can hold (which will vary depending on the tuple size and index fill factor). We compare Swap, which simulates a read-only workload that does not overwrite the index cache (constant cache size), and Shri ...
Chapter 3
... is a temporary view of the data. However, when you update data by means of the query datasheet, the updates are placed directly into the underlying table. You can only update fields that are represented in the query. To observe the actual changes made to the table, you will want to close the query a ...
... is a temporary view of the data. However, when you update data by means of the query datasheet, the updates are placed directly into the underlying table. You can only update fields that are represented in the query. To observe the actual changes made to the table, you will want to close the query a ...
Using DB2 BLU to enable IBM Cúram Business Intelligence and Analytics
... Analytics are built from data mart tables, as a result, the number of read requests is much greater than the number of write requests. With green field projects, deciding how to use columnar tables is simpler. The data mart database is created as a columnar database, this configuration results in al ...
... Analytics are built from data mart tables, as a result, the number of read requests is much greater than the number of write requests. With green field projects, deciding how to use columnar tables is simpler. The data mart database is created as a columnar database, this configuration results in al ...
Connecting Business Objects to Relational Databases
... Developers of object-oriented systems that use a relational database usually spend a lot of time making objects persistent. This is because of a fundamental impedance mismatch1 between the two paradigms; objects consist of both data and behavior and often have inheritance while relational databases ...
... Developers of object-oriented systems that use a relational database usually spend a lot of time making objects persistent. This is because of a fundamental impedance mismatch1 between the two paradigms; objects consist of both data and behavior and often have inheritance while relational databases ...
Making Your Network Safe for Databases
... securing the web server and little thought goes into how the database may be vulnerable because all of the ‘front-end’ security has been implemented. But databases usually contain a company’s most valuable information assets, and if compromised, could wreak havoc. While much press is given to denial ...
... securing the web server and little thought goes into how the database may be vulnerable because all of the ‘front-end’ security has been implemented. But databases usually contain a company’s most valuable information assets, and if compromised, could wreak havoc. While much press is given to denial ...
RQL: A SQL-like Query Language for Discovering
... analysts. Most of the time, they have to perform some data preprocessing between different systems and formats. The pattern mining codes themselves often require to be compiled from some specific programming languages. All these steps are out of reach of many data analysts, rending round-trip engine ...
... analysts. Most of the time, they have to perform some data preprocessing between different systems and formats. The pattern mining codes themselves often require to be compiled from some specific programming languages. All these steps are out of reach of many data analysts, rending round-trip engine ...
Chapter 8
... In Q8, the alternate relation names E and S are called aliases or tuple variables for the EMPLOYEE relation We can think of E and S as two different copies of EMPLOYEE; E represents employees in role of supervisees and S represents employees in role of supervisors Slide 8- 46 ...
... In Q8, the alternate relation names E and S are called aliases or tuple variables for the EMPLOYEE relation We can think of E and S as two different copies of EMPLOYEE; E represents employees in role of supervisees and S represents employees in role of supervisors Slide 8- 46 ...
PHP MySQL Introduction
... Furthermore, the primary key field cannot be null because the database engine requires a value to locate the record. • The following example sets the personID field as the primary key field. The primary key field is often an ID number, and is often used with the AUTO_INCREMENT ...
... Furthermore, the primary key field cannot be null because the database engine requires a value to locate the record. • The following example sets the personID field as the primary key field. The primary key field is often an ID number, and is often used with the AUTO_INCREMENT ...
Outline
... unique value in its primary-key field • Compound Primary key: when a record has a unique key based on a combination of two fields • Foreign key: – Field for which every entry has a unique value in another table and where the field in the other table is the primary key for that table – Rule of Refere ...
... unique value in its primary-key field • Compound Primary key: when a record has a unique key based on a combination of two fields • Foreign key: – Field for which every entry has a unique value in another table and where the field in the other table is the primary key for that table – Rule of Refere ...
Chapter 19: Distributed Databases
... Log contain record: site executes redo (T)
Log contains record: site executes undo (T)
Log contains record: site must consult Ci to determine the
...
... Log contain
SharePoint 2010 Readiness
... To create new sites using the template create a site using the template, upgrade the database, and export the site as a WSP ...
... To create new sites using the template create a site using the template, upgrade the database, and export the site as a WSP ...
Slides - Department of Computer Science
... An array of sequential numbers: $values = range(5, 10); Computer Engineering Dept. Spring 2017: February 14 ...
... An array of sequential numbers: $values = range(5, 10); Computer Engineering Dept. Spring 2017: February 14 ...
select
... – AND: (true and unknown) = unknown, (false and unknown) = false, (unknown and unknown) = unknown – NOT: (not unknown) = unknown – “P is unknown” evaluates to true if predicate P evaluates to unknown ...
... – AND: (true and unknown) = unknown, (false and unknown) = false, (unknown and unknown) = unknown – NOT: (not unknown) = unknown – “P is unknown” evaluates to true if predicate P evaluates to unknown ...
RAK - Friedrich Lehn | Consultant, Coach & Trainer
... Target baseline: target database version (delivery stream plus timestamp as name) create delta DDL depending on release baseline and latest target baseline (PATROL) apply delta DDL ...
... Target baseline: target database version (delivery stream plus timestamp as name) create delta DDL depending on release baseline and latest target baseline (PATROL) apply delta DDL ...
Fast Track Data Warehouse Reference
... applied, so disk scan performance becomes a increasing priority in contrast to transactional workloads that stress disk seek time. The FTDW reference architecture optimizes hardware and database software components with disk scan performance as the key priority. This results in more efficient sequen ...
... applied, so disk scan performance becomes a increasing priority in contrast to transactional workloads that stress disk seek time. The FTDW reference architecture optimizes hardware and database software components with disk scan performance as the key priority. This results in more efficient sequen ...
Employees
... A weak entity can be identified uniquely only by considering the primary key of another (owner) entity. – Owner entity set and weak entity set must participate in a one-to-many relationship set (1 owner, many weak entities). – Weak entity set must have total participation in this identifying relatio ...
... A weak entity can be identified uniquely only by considering the primary key of another (owner) entity. – Owner entity set and weak entity set must participate in a one-to-many relationship set (1 owner, many weak entities). – Weak entity set must have total participation in this identifying relatio ...
Y700300 - Florida Department Of Education
... Design a unit test plan for an object-oriented computer program, test and debug the program, and report the results Develop an awareness of the changes taking place in the information age and how they fit into an evolving society. Develop the "big picture" of database design and how to best organize ...
... Design a unit test plan for an object-oriented computer program, test and debug the program, and report the results Develop an awareness of the changes taking place in the information age and how they fit into an evolving society. Develop the "big picture" of database design and how to best organize ...
w03_1_INF280_Relational_Model
... Relational Model represents database as a collection of relations. • A relation may be considered as a table of values, where each row represents a collection of related values, forming an instance, a fact, corresponding with an entity in an entity-set. • Table-name and columns-names are used to int ...
... Relational Model represents database as a collection of relations. • A relation may be considered as a table of values, where each row represents a collection of related values, forming an instance, a fact, corresponding with an entity in an entity-set. • Table-name and columns-names are used to int ...
Microsoft Jet Database Engine
The Microsoft Jet Database Engine is a database engine on which several Microsoft products have been built. A database engine is the underlying component of a database, a collection of information stored on a computer in a systematic way. The first version of Jet was developed in 1992, consisting of three modules which could be used to manipulate a database.Database connect for MicrosoftJET stands for Joint Engine Technology, sometimes being referred to as Microsoft JET Engine or simply Jet. Microsoft Access and Visual Basic use or have used Jet as their underlying database engine. It has since been superseded for general use, however, first by Microsoft Desktop Engine (MSDE), then later by SQL Server Express. For larger database needs, Jet databases can be upgraded (or, in Microsoft parlance, ""up-sized"") to Microsoft's flagship database product, SQL Server.However, this does not mean that a MS Jet (Red) database cannot match MS SQL Server in storage capacity. A 5 billion record MS Jet (Red) database with compression and encryption turned on requires about 1 terabyte of disk storage space, comprising hundreds of (*.mdb) files, each acting as partial table, and not as a database in itself.Over the years, Jet has become almost synonymous with Microsoft Access, to the extent that many people refer to a Jet database as an ""Access database"".