Data (computer science): Difference between revisions

Revision as of 01:12, 25 October 2024

Revision as of 01:13, 25 October 2024

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===Abstraction and indirection===

* [[Object-oriented programming]] uses two basic concepts for understanding data and software:

# The taxonomic rank-structure of ''[[Class (computer programming)|classes]]'', which is an example run time, the creation of referencesa tohierarchical in-zg)#Objectdata lisstructure; liband

# at run time, the creation of references to in-memory data-structures of objects that have been [[Instance (computer science)|instantiated]] from a [[Library (computing)#Object libraries|class library]].

It is only after instantiation that an objenobject of a specified class exists. After an object's ryreference is cleared, the object also ceases to exist. The memory locations where the object's data was stornstored are [[Garbage collection (computer science)|garbage]] and are reclassified as unused memory available for reuse.

===Database data===

* The advent of [[database]]s introduced a further [[Abstraction layer|layer of abstraction]] for persisteentpersistent data storage. Databases use [[metadata]], and a [[SQL|structured query language]] protocol between [[Client–server model|client and server]] systems, ccatingcommunicating over a [[compcomputer network]], using a [[Two-phase commit protocol|two phase commit]] logging system to ensure [[Database transaction|transactional]] completeness, when saving data.

===Parallel distributed data processing===

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==See also==

{{div col|colmcolwidth=20em}}

* [[BiBig data]]

* [[Data]]

* [[Data dictionary]]

* [[Data modeling]]

* [[Data stream]]

* [[Data set]]

* [[Database index]]

* [[State (computer science)]]

* [[Tuple]]

{{div col end}}

==References==

{{reflist}}

{{data}}

{{Authority contcontrol}}

[[Category:Computer data| ]]