podoc:number_of_camera_references_sql_function
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podoc:number_of_camera_references_sql_function [2007/04/12 12:26] – Luud | podoc:number_of_camera_references_sql_function [2007/04/23 14:30] (current) – Luud | ||
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- | ===== Database Function Description ===== | + | ===== Database Function Description |
=== Name === | === Name === | ||
+ | |||
+ | number_of_camera_references | ||
=== Description === | === Description === | ||
+ | |||
+ | Counts the number of references for a specific camera. | ||
+ | |||
+ | // Tentative (is this correct?): // this represents the number of photos in the database generated by the specified camera. | ||
=== Purpose === | === Purpose === | ||
+ | |||
+ | To retrieve the number of references to a particular camera. | ||
=== Schema === | === Schema === | ||
+ | |||
+ | <code sql> | ||
+ | create function number_of_camera_references(integer) returns bigint | ||
+ | as ' | ||
+ | from photo_tech, camera | ||
+ | where photo_tech.camera=camera.identifier | ||
+ | and camera.identifier = $1' language ' | ||
+ | </ | ||
=== Related tables === | === Related tables === | ||
- | === Related views === | + | * [[camera sql table|camera]] |
- | + | * [[photo_tech sql table|photo_tech]] | |
- | === Related sequences === | + | |
- | + | ||
- | === Related indexes === | + | |
=== History === | === History === | ||
Line 31: | Line 44: | ||
= Version 2.5 = | = Version 2.5 = | ||
- | | + | <code sql> |
- | ... | + | create function |
- | ); | + | as ' |
+ | from photo_tech, camera | ||
+ | where photo_tech.camera=camera.identifier | ||
+ | and camera.identifier = $1' language ' | ||
+ | </ |
podoc/number_of_camera_references_sql_function.txt · Last modified: 2007/04/23 14:30 by Luud