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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.

× 707
Splitting a database table into multiple segments for performance or manageability.
× 702
UPDATE changes the values of the specified columns in all rows that satisfy the condition. Only the columns to be modified need be mentioned in the SET clause; columns not explicitly modified retain t…
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A widely-used open-source operating system that is particularly popular on servers.
× 694
A type of integrity constraint used in a RDBMS platform to ensure that a value in a column matches one of a range of key values from another table.
× 663
Oracle Database 12c. Please also tag oracle for search purposes.
× 640
the process of moving databases or data from one place to another
× 635
Oracle Database 11g (not 11g R2). Please also tag oracle for search purposes.
× 610
a relational model database server developed by IBM. It primarily runs on Unix (namely AIX), Linux, IBM i (formerly OS/400), z/OS and Windows servers.
× 601
a list/history of modification executed by a database management system to guarantee ACID properties over crashes or hardware failures.
× 598
useful and which are not.
× 581
A mechanism for managing concurrent access to shared data or resources by granting temporarily exclusive access to the processes requesting the lock.
× 580
MySQL's Standard Dump/Backup Utility
× 576
PostgreSQL version 9.3
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directly relevant to the question and likely to be the source of your problem, not just because you're using a PHP library to connect to a database. PHP stands for Professional Hype…
× 559
a relational database management system that is part of the Microsoft Office suite.
× 555
A core statement in SQL that does what it says on the tin: inserts data into a table.
× 546
a web service that makes it easy to set up, operate, and scale a relational database in the cloud.
× 542
Writing queries to request or change information stored in a database or other information management system. Questions should include table and index definitions, sample data, expected output, and a …
× 541
The choice of settings for hardware, firmware, software or other components of a database system.
× 532
A cluster consists of a group of computers connected so that in many respects they can be viewed as a single system.
× 528
When used in the context of databases, memory refers to RAM directly addressable by the CPU as opposed to going through the I/O subsystem.
× 528
the process of organizing columns into tables within a relational database in such a way as to minimize redundancy and avoid insertion, update and deletion anomalies.
× 513
Operating system produced by Microsoft. Windows is produced in various desktop and server versions. Please also add a version-specific tag like windows-10 if that is relevant to the question.
× 507
A mechanism for committing a consistent set of changes into a database atomically.
× 504
Installation (or setup) of a database application, is the act of putting the application onto a computer system so that it can be executed.
× 500
A virtual table that represents the data in one or more tables in an alternative way.
× 494
PostgreSQL version 9.4
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GROUP BY : SQL Aggregation for Common Values
× 485
PostgreSQL performance optimization. Essential to include sufficient information in your question as outlined in the full tag wiki.
× 484
SQL Server Reporting Services, a web based reporting tool produced by Microsoft and bundled with SQL Server.
× 481
MySQL version 5.7 - please also tag with mysql for search purposes.
× 479
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 (use azure-vm).
× 479
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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Linked server allows operation to multiple server as one query.
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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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the non-transactional storage engine for MySQL. It provides high-speed storage and retrieval, as well as fulltext searching capabilities. In addition, it is the default storage engine type f…