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<title>Row (database)</title>

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<p>In a <a href="Relational_database" title="Relational database">relational database</a>, a <b>row</b> or "<a href="Record_(computer_science)" title="Record (computer science)">record</a>" or "<a href="Tuple" title="Tuple">tuple</a>", represents a single, implicitly structured <a href="Data" title="Data">data</a> item in a <a href="Table_(database)" title="Table (database)">table</a>. A database table can be thought of as consisting of rows and <a href="Column_(database)" title="Column (database)">columns</a>.<sup id="cite_ref-1" class="reference"><a href="#cite_note-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup> Each row in a table represents a set of related data, and every row in the table has the same structure.

</p><p>For example, in a table that represents companies, each row might represent a single company. Columns might represent things like company name, address, etc. In a table that represents <i>the association</i> of employees with departments, each row would associate one employee with one department.

</p><p>The implicit structure of a row, and the meaning of the data values in a row, requires that the row be understood as providing a succession of data values, one in each column of the table. The row is then interpreted as a <a href="Relvar" title="Relvar">relvar</a> composed of a set of <a href="Tuple" title="Tuple">tuples</a>, with each tuple consisting of the two items: the name of the relevant column and the value this row provides for that column.

</p><p>Each column expects a data value of a particular <a href="Datatype" class="mw-redirect" title="Datatype">type</a>.

</p><p>For example, one column might require a unique <a href="Identifier" title="Identifier">identifier</a>, another might require text representing a person's name, another might require an integer representing hourly pay in <a href="Dollar" title="Dollar">dollars</a>.

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<div class="mw-heading mw-heading2"><h2 id="References">References</h2></div>

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<li id="cite_note-1"><span class="mw-cite-backlink"><b><a href="#cite_ref-1">^</a></b></span> <span class="reference-text"><a rel="nofollow" class="external text" href="http://www.techopedia.com/definition/4425/database-row">"What is a database row?"</a> Cory Janssen, Techopedia, retrieved 27 June 2014</span>

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</style><div id="Database_management_systems327" style="font-size:114%;margin:0 4em"><a href="Database" title="Database">Database management systems</a></div></th></tr><tr><th scope="row" class="navbox-group" style="width:1%">Types</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em">

<ul><li><a href="Object_database" title="Object database">Object-oriented</a>

<ul><li><a href="Comparison_of_object_database_management_systems" title="Comparison of object database management systems">comparison</a></li></ul></li>

<li><a href="Relational_database" title="Relational database">Relational</a>

<li><a href="Comparison_of_relational_database_management_systems" title="Comparison of relational database management systems">comparison</a></li></ul></li>

<li><a href="Key%E2%80%93value_database" title="Key–value database">Key–value</a></li>

<li><a href="Column-oriented_DBMS" class="mw-redirect" title="Column-oriented DBMS">Column-oriented</a>

<li><a href="Document-oriented_database" title="Document-oriented database">Document-oriented</a></li>

<li><a href="Wide-column_store" title="Wide-column store">Wide-column store</a></li>

<li><a href="Graph_database" title="Graph database">Graph</a></li>

<li><a href="NoSQL" title="NoSQL">NoSQL</a></li>

<li><a href="NewSQL" title="NewSQL">NewSQL</a></li>

<li><a href="In-memory_database" title="In-memory database">In-memory</a>

<li><a href="Multi-model_database" title="Multi-model database">Multi-model</a>

<ul><li><a href="Comparison_of_multi-model_databases" title="Comparison of multi-model databases">comparison</a></li></ul></li>

<li><a href="Cloud_database" title="Cloud database">Cloud</a></li>

<li><a href="Blockchain-based_database" title="Blockchain-based database">Blockchain-based database</a></li></ul>

</div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Concepts</th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em">

<ul><li><a href="Database" title="Database">Database</a></li>

<li><a href="Armstrong's_axioms" title="Armstrong's axioms">Armstrong's axioms</a></li>

<li><a href="Codd's_12_rules" title="Codd's 12 rules">Codd's 12 rules</a></li>

<li><a href="CAP_theorem" title="CAP theorem">CAP theorem</a></li>

<li><a href="Candidate_key" title="Candidate key">Candidate key</a></li>

<li><a href="Foreign_key" title="Foreign key">Foreign key</a></li>

<li><a href="PACELC_design_principle" title="PACELC design principle">PACELC design principle</a></li>

<li><a href="Superkey" title="Superkey">Superkey</a></li>

<li><a href="Surrogate_key" title="Surrogate key">Surrogate key</a></li>

<li><a href="Unique_key" title="Unique key">Unique key</a></li></ul>

</div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Objects</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em">

<ul><li><a href="Relation_(database)" title="Relation (database)">Relation</a>

<ul><li><a href="Table_(database)" title="Table (database)">table</a></li>

<li><a href="Column_(database)" title="Column (database)">column</a></li>

</ul></li>

<li><a href="Database_transaction" title="Database transaction">Transaction</a></li>

<li><a href="Transaction_log" title="Transaction log">Transaction log</a></li>

<li><a href="Database_trigger" title="Database trigger">Trigger</a></li>

<li><a href="Database_index" title="Database index">Index</a></li>

<li><a href="Stored_procedure" title="Stored procedure">Stored procedure</a></li>

<li><a href="Cursor_(databases)" title="Cursor (databases)">Cursor</a></li>

<li><a href="Partition_(database)" title="Partition (database)">Partition</a></li></ul>

</div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Components</th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em">

<ul><li><a href="Concurrency_control" title="Concurrency control">Concurrency control</a></li>

<li><a href="Data_dictionary" title="Data dictionary">Data dictionary</a></li>

<li><a href="Query_language" title="Query language">Query language</a></li>

<li><a href="Query_optimization" title="Query optimization">Query optimizer</a></li>

<li><a href="Query_Rewriting" class="mw-redirect" title="Query Rewriting">Query rewriting system</a></li>

<li><a href="Query_plan" title="Query plan">Query plan</a></li></ul>

</div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Functions</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em">

<ul><li><a href="Database_administration" title="Database administration">Administration</a></li>

<li><a href="Query_optimization" title="Query optimization">Query optimization</a></li>

<li><a href="Replication_(computing)#DATABASE" title="Replication (computing)">Replication</a></li>

<li><a href="Shard_(database_architecture)" title="Shard (database architecture)">Sharding</a></li></ul>

</div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Related topics</th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em">

<ul><li><a href="Database_model" title="Database model">Database models</a></li>

<li><a href="Database_normalization" title="Database normalization">Database normalization</a></li>

<li>Database storage</li>

<li><a href="Distributed_database" title="Distributed database">Distributed database</a></li>

<li><a href="Federated_database_system" title="Federated database system">Federated database system</a></li>

<li><a href="Referential_integrity" title="Referential integrity">Referential integrity</a></li>

<li><a href="Relational_algebra" title="Relational algebra">Relational algebra</a></li>

<li><a href="Relational_calculus" title="Relational calculus">Relational calculus</a></li>

<li><a href="Relational_model" title="Relational model">Relational model</a></li>

<li><a href="Object%E2%80%93relational_database" title="Object–relational database">Object–relational database</a></li>

<li><a href="Transaction_processing" title="Transaction processing">Transaction processing</a></li></ul>

</div></td></tr><tr><td class="navbox-abovebelow" colspan="2"><div>

<ul><li><span class="noviewer" typeof="mw:File"><span title="Category"></span></span> Category</li>

<li><span class="noviewer" typeof="mw:File"><span title="Outline"></span></span> <a href="Outline_of_databases" title="Outline of databases">Outline</a></li></ul>

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