16 lines
585 B
Markdown
16 lines
585 B
Markdown
|
---
|
||
|
|
tags:
|
||
|
|
- databases
|
||
|
|
---
|
||
|
|
|
||
|
|
# Views in relational databases
|
||
|
|
|
||
|
|
A view is a virtual table that is based on the result-set of a query. Although
|
||
|
|
it doesn't actually exist in the same manner as an actual table it has exactly
|
||
|
|
the same properties and functionality. Rather than adding the raw data manually,
|
||
|
|
you derive it from logic applied to existing actual tables.
|
||
|
|
|
||
|
|
This is a good way of dynamically generating data and is often employed as a way
|
||
|
|
of creating mutations without changing the underlying data structure. In SQL,
|
||
|
|
views can be created by combining `PRIMARY` and `FOREIGN` keys.
|