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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Percona : MySQL open source fork with performance improvements
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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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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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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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PostgreSQL 9.4 : 2014 release of PostgreSQL
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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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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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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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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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Performance tuning done by adjusting database parameters or physical layout of the database.
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Command-Line Utility Program for Oracle
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represent missing, unknown or inapplicable data.
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an Oracle command line tool for doing backup, restore, and recovery operations.
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Can refer to disks in a RAID-1 configuration, or low-latency database replication strategies.
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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 function of many relational database management systems. The query optimizer attempts to find an efficient way to execute a given query by considering the possible query plans.
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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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Transferring log records from a source database system to one or more destination systems.
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Database administrator
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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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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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A tool that reads and analyses event trace information from a database management system.
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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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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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'Extract, Transform and Load': Data load processing, normally in the context of data warehouse systems.
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The conversion of data into a form that cannot be easily understood by unauthorized users.
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In computing, ODBC (Open Database Connectivity) is a standard C programming language interface for accessing database management systems (DBMS).
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The PIVOT syntax converts row data into columnar data, and vice versa for the UNPIVOT syntax. Not all databases support the PIVOT syntax but the functionality can be implemented, often using decision …
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