A tag is a keyword or label that categorizes your question with other, similar questions. Using the right tags makes it easier for others to find and answer your question.

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A cluster consists of a group of computers connected so that in many respects they can be viewed as a single system.
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The choice of settings for hardware, firmware, software or other components of a database system.
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describe when a `SELECT` statement is used as part of a larger SQL statement. The larger statement may be DML and is always found within brackets or parenthesis.
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A catch-all term describing database systems using various non-relational models. Such systems are usually engineered to be high-performance.
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A popular open-source embeddable (i.e. non client-server) RDBMS implemented as a C library.
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A database system optimised for reporting, particularly in aggregate. Often, but not always implemented using a star schema.
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a desktop and server operating system based on Debian GNU/Linux. Note that http://askubuntu.com is specifically dedicated to Ubuntu questions.
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Specifies the type of data being stored (string, date, numeric, etc).
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mysql-5 : Version of MySQL Starting with MySQL 5.0
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A declarative mechanism such as a check or foreign key that enforces some data integrity rule in a database.
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SQL Server Reporting Services, a web based reporting tool produced by Microsoft and bundled with SQL Server.
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specifically for PostgreSQL version 9.2
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GROUP BY : SQL Aggregation for Common Values
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Reconstructing a database.
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a web service that makes it easy to set up, operate, and scale a relational database in the cloud.
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Combining multiple data points into a single data point. This usually is used in reference to SQL and usually to an aggregate function of some sort.
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In the database structured query language (SQL), the DELETE statement removes one or more records from a table.
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The strategy selected by the query optimiser to process a query.
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Short for 'eXtensible Markup Language.' A textual markup language for transferring structured data.
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SQL Server Analysis Services, an OLAP server bundled with SQL Server by Microsoft since version 7.0
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A function performs some specified work, usually taking parameters as input. In terms of databases these may be specific to SQL or to the database vendor.
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a new feature of SQL Server 2012 that provide continuous data synchronization, automatic failover and secondary read access for one or many SQL Server databases.
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For questions about database backups.
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an open source tool written in PHP to handle administration of MySQL over the web. It can perform various tasks such as creating, modifying or deleting databases, tables, fields or rows;…
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Upgrade refers to the replacement of a product with a newer version of the same product. - replace (a software program) with a more recently released, enhanced version. - replace (a hardware devic…
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The automated distribution of transactional changes from a publishing database to one or more subscriber databases.
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Improving the performance characteristics of a database application or system.
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A data structure that organizes information into rows and columns.
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The process of identifying the party logging into a system.
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A sequential journal of database write operations that facilitates robust atomic write operations.
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a Windows service installed with the SQL Server Standard Edition and above. It provides an automated way of executing or performing administrative task against a SQL Server instanc…
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A type of replication in SQL Server in which Publishers and Subscribers can work autonomously and later reconnect, synchronize, and merge data changes to achieve convergence among all nodes in the top…
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A clause used in SQL SELECT statements to sort query results.
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The process and means of extracting data from a database for use elsewhere.
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High-availability technologies mask the effects of hardware or software failure, so that perceived downtime for users and applications is minimized.
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Percona : MySQL open source fork with performance improvements