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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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Determining what database product best fits the requirements and limitations in a specific situation. This is advice that generally requires much more insight into requirements than can easily be gle…
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Database auditing involves observing a database so as to be aware of the actions of database users.
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A scheduled task managed by the database, for example using SQL Server Agent, Oracle dbms_job, or MySQL Event Scheduler.
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Establishing a connection to a database or database server.
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Constructing a query at runtime with string concatenation operations and executing the query from that string.
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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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objects that contain statistical information about the distribution of values in one or more columns of a table or indexed view.
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Percona : MySQL open source fork with performance improvements
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PostgreSQL version 9.1
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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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Entity Relationship Diagram
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for questions specific to data types that contain both date and time parts.
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MySQL version 5.1 - please also tag with mysql for search purposes.
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The conversion of data into a form that cannot be easily understood by unauthorized users.
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a task-based command-line shell and scripting language designed especially for automation of Windows tasks. It has become the defacto CLI for Microsoft products since the its re…
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alter an existing table object.
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The process of identifying the party logging into a system.
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SQL Server 2000 (major build version 8.00.xxxx). Please also tag sql-server.
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For questions about generating or using language scripts, for example scripting a database object definition.
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For questions about database user accounts.
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Transferring log records from a source database system to one or more destination systems.
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For questions about the storage space used by databases or database objects.
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represent missing, unknown or inapplicable 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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For questions about login credentials and accounts used to access a database resource, typically at the server or instance level.
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the practice of logically dividing or partitioning data, usually using a specific key (referred to as a shard key), and then placing that data on separate hosts (subsequently known as shar…
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The process and means of extracting data from a database for use elsewhere.
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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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PostgreSQL version 9.2
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PostgreSQL version 10
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Acronym for Common Table Expression. Temporary, reusable subquery that may be recursive.
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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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Short for Recovery Manager is an Oracle command line tool for doing backup, restore, and recovery operations. Also tag RMAN questions with the appropriate Oracle version tag.
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For questions about the persistent storage of database data.
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Data Definition Language; defining database structures but not their contents.
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Use this for problems that involve returning one or more rows from each group in a data set. Despite the name, this tag is suitable for *minimum-* and *maximum-* per group queries.