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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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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alter an existing table object.
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Database restoring refers to the concept of restore a database from a backup or a copy.
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In the context of a database, maintenance describes routine operational tasks around a database system, such as monitoring, tuning and backup procedures.
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a relational database-as-a-service from Microsoft. This tag is for questions about Azure SQL Database, not SQL Server hosted in an Azure VM.
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used to count the number of rows.
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a general-purpose, managed, garbage-collected, object-oriented programming language created by Microsoft.
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the default procedural language for the PostgreSQL database system. Questions about PL/pgSQL should probably be tagged "PostgreSQL" as well.
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A type of index mostly used in SQL-Server, which aligns the data of a table with the index.
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an object-oriented language and runtime environment. Java programs can run unchanged on most platforms in a Virtual Machine called the JVM.
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Command-Line Utility Program for Oracle
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Can refer to disks in a RAID-1 configuration, or low-latency database replication strategies.
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represent missing, unknown or inapplicable data.
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Performance tuning done by adjusting database parameters or physical layout of the database.
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an Oracle command line tool for doing backup, restore, and recovery operations.
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A commonly used name for Microsoft SQL Server Reporting Services (SSRS), a web based reporting tool bundled with Microsoft SQL Server.
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For questions about the persistent storage of database data.
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the concept of moving services from one host or node to another in order to provide high availability in a computing system.
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Primary interactive terminal for PostgreSQL
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An ongong check of various statistics and events, which can be used to spot telltale signs of underlying issues.
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Transferring log records from a source database system to one or more destination systems.
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A tool that reads and analyses event trace information from a database management system.
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a set of rules that determine how data is sorted and compared for comparing characters in a character set.
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part of MS SQL Server. It's a system database that functions as a storage area for temporary tables, internal objects and row versions.
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A range of RDBMS and BI products from Sybase Corporation, distantly related to MS SQL Server. Their RDBMS offerings span the full range from an enterprise-grade "big iron" RDBMS down to a lightweight …
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Data corruption refers to errors in computer data that occur during writing, reading, storage, transmission, or processing, which introduce unintended changes to the original data
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For questions about issues arising when multiple users or processes concurrently access or modify shared information in a database system.
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The conversion of data into a form that cannot be easily understood by unauthorized users.
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a graphical administration and development tool for PostgreSQL.
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Relational Database Management System, a widely used type of database management system characterised by its extensive use of joining as a core operational principle.