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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The process and means of extracting data from a database for use elsewhere.
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The process of identifying the party logging into a system.
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A pivot (or crosstab) converts row data into columnar data, and vice versa for an unpivot. Not all databases support explicit PIVOT syntax but the functionality can be implemented, often using decisio…
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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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Database auditing involves observing a database so as to be aware of the actions of database users.
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alter an existing table object.
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A sequential journal of database write operations that facilitates robust atomic write operations.
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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 general-purpose, managed, garbage-collected, object-oriented programming language created by Microsoft.
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Establishing a connection to a database or database server.
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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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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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Command-Line Utility Program for Oracle
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for questions specific to data types that contain both date and time parts.
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Transferring log records from a source database system to one or more destination systems.
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a free tool for SQL & PL/SQL development and reporting similar to Quest's Toad or Allround Automations' PL/SQL Developer.
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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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A type of index mostly used in SQL-Server, which aligns the data of a table with the index.
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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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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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The conversion of data into a form that cannot be easily understood by unauthorized users.
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an Oracle command line tool for doing backup, restore, and recovery operations.
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Constructing a query at runtime with string concatenation operations and executing the query from that string.
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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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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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Entity Relationship Diagram
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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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For questions about the persistent storage of database 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.