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Cost-based query optimization
Cost-based query optimization

... Choose order of joining tables Choose algorithms used for each join  – Adapt to available main memory  – pipeline intermediated results (streaming)  – materialize intermediate results if favourable  – Eliminate duplicates in stream  – sort intermediate results ...
Discovering Computers 2008
Discovering Computers 2008

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DBA Guide to Databases on VMware
DBA Guide to Databases on VMware

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Moving Objects Databases - Worcester Polytechnic Institute
Moving Objects Databases - Worcester Polytechnic Institute

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... project, must be carefully designed, implemented, and tested. • Because security may affect the execution of some procedures, it must be taken into account when the project code is being developed. • A permission is used to grant an entity (such as a user access) to an object (such as another user o ...
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Structured Query Language (SQL)

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Using PHP to Retrieve Data
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... Connects to the database, Reads only the interesting records, Holds data in a recordset, Reads the data from each of the fields, Writes information out to the user, Moves on to the next record. Nic Shulver, [email protected] ...
Data Mining - an interactive approach to customer database segmentation using recency-frequency-value model
Data Mining - an interactive approach to customer database segmentation using recency-frequency-value model

... database so that appropriate customers can be matched to specific products • Clustering: a technique used to place customers into groups (treatment segments) suggested by the data ...
C-Store: The Life of a Query - Sun Yat
C-Store: The Life of a Query - Sun Yat

... control to the query executor’s operators. Operators generate result tuples. Result tuples are placed in a buffer for the Client Communication Manager The Client Communication Manager ships the result tuples back to the Client. At the end of the query, the transaction is completed. ...
Database Systems: Design, Implementation, and Management Ninth
Database Systems: Design, Implementation, and Management Ninth

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Database Systems: Design, Implementation, and Management 11th
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Maintaining a Microsoft SQL Server 2005 Database
Maintaining a Microsoft SQL Server 2005 Database

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Chapter 9
Chapter 9

... Update on a view defined on a single table without any aggregate functions: ...
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Database

A database is an organized collection of data. It is the collection of schemes, tables, queries, reports, views and other objects.The data is typically organized to model aspects of reality in a way that supports processes requiring information, such as modelling the availability of rooms in hotels in a way that supports finding a hotel with vacancies.A database management system (DBMS) is a computer software application that interacts with the user, other applications, and the database itself to capture and analyze data. A general-purpose DBMS is designed to allow the definition, creation, querying, update, and administration of databases. Well-known DBMSs include MySQL, PostgreSQL, Microsoft SQL Server, Oracle, Sybase and IBM DB2. A database is not generally portable across different DBMSs, but different DBMS can interoperate by using standards such as SQL and ODBC or JDBC to allow a single application to work with more than one DBMS. Database management systems are often classified according to the database model that they support; the most popular database systems since the 1980s have all supported the relational model as represented by the SQL language. Sometimes a DBMS is loosely referred to as a 'database'.
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