Difference between revisions of "Database structure"
From PhotoVoltaic Logger new generation
(Created page with "== Abstract == === pvlng_type === File:DBTableType.png === pvlng_channel === File:DBTableChannel.png === pvlng_tree === The channel tree is organized in a nested...") |
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== Abstract == | == Abstract == | ||
| − | + | == pvlng_type == | |
[[File:DBTableType.png]] | [[File:DBTableType.png]] | ||
| − | + | == pvlng_channel == | |
[[File:DBTableChannel.png]] | [[File:DBTableChannel.png]] | ||
| − | + | == pvlng_tree == | |
The channel tree is organized in a nested set structure. | The channel tree is organized in a nested set structure. | ||
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[[File:DBTableTree.png]] | [[File:DBTableTree.png]] | ||
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| + | == pvlng_reading_num / pvlng_reading_str == | ||
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| + | [[File:DBTableReadingNum.png]][[File:DBTableReadingStr.png]] | ||
Revision as of 16:29, 2 March 2014
Contents
Abstract
pvlng_type
pvlng_channel
pvlng_tree
The channel tree is organized in a nested set structure.
The nested set model is a particular technique for representing nested sets (also known as trees or hierarchies) in relational databases. -- Wikipedia:Nested set model
More theory about nested sets.
pvlng_reading_num / pvlng_reading_str
