Difference between revisions of "Semantic MediaWiki/data/smw rels2"
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(Created page with "==About== * '''Version''': 1.7 ==SQL== <mysql>CREATE TABLE `smw_rels2` ( `s_id` int(8) unsigned NOT NULL, `p_id` int(8) unsigned NOT NULL, `o_id` int(8) unsigned DEFAULT...") |
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==About== | ==About== | ||
* '''Version''': 1.7 | * '''Version''': 1.7 | ||
| + | * '''Documentation status''': unofficial; confirmed only by testing | ||
| + | * '''Purpose''': defines semantic relationships between property-names and property-values, where the values have an SMW ID | ||
| + | * '''Foreign keys''': {{l/same|smw_ids}}.smw_id | ||
| + | * '''Fields''': | ||
| + | ** '''s_id''': [[../smw_ids|SMW ID]] of a page on which the property name-value pair is defined | ||
| + | ** '''p_id''': [[../smw_ids|SMW ID]] of the property name | ||
| + | ** '''o_id''': [[../smw_ids|SMW ID]] of the property value | ||
==SQL== | ==SQL== | ||
<mysql>CREATE TABLE `smw_rels2` ( | <mysql>CREATE TABLE `smw_rels2` ( | ||
| Line 10: | Line 17: | ||
KEY `o_id` (`o_id`) | KEY `o_id` (`o_id`) | ||
) ENGINE=InnoDB DEFAULT CHARSET=binary;</mysql> | ) ENGINE=InnoDB DEFAULT CHARSET=binary;</mysql> | ||
| + | ===Examples=== | ||
| + | <mysql> | ||
| + | SELECT s_id | ||
| + | , s.smw_namespace AS s_namespace | ||
| + | , CAST(s.smw_title AS char) AS s_title | ||
| + | , CAST(p.smw_title AS char) AS p_title | ||
| + | , CAST(o.smw_title AS char) AS o_title | ||
| + | FROM | ||
| + | ((smw_rels2 AS r | ||
| + | LEFT JOIN smw_ids AS s ON r.s_id=s.smw_id) | ||
| + | LEFT JOIN smw_ids AS p ON r.p_id=p.smw_id) | ||
| + | LEFT JOIN smw_ids AS o ON r.o_id=o.smw_id; | ||
| + | </mysql> | ||
Latest revision as of 15:53, 17 December 2012
About
- Version: 1.7
- Documentation status: unofficial; confirmed only by testing
- Purpose: defines semantic relationships between property-names and property-values, where the values have an SMW ID
- Foreign keys: smw_ids.smw_id
- Fields:
SQL
<mysql>CREATE TABLE `smw_rels2` (
`s_id` int(8) unsigned NOT NULL, `p_id` int(8) unsigned NOT NULL, `o_id` int(8) unsigned DEFAULT NULL, KEY `s_id` (`s_id`), KEY `p_id` (`p_id`), KEY `o_id` (`o_id`)
) ENGINE=InnoDB DEFAULT CHARSET=binary;</mysql>
Examples
<mysql> SELECT s_id
, s.smw_namespace AS s_namespace , CAST(s.smw_title AS char) AS s_title , CAST(p.smw_title AS char) AS p_title , CAST(o.smw_title AS char) AS o_title FROM ((smw_rels2 AS r LEFT JOIN smw_ids AS s ON r.s_id=s.smw_id) LEFT JOIN smw_ids AS p ON r.p_id=p.smw_id) LEFT JOIN smw_ids AS o ON r.o_id=o.smw_id;
</mysql>