Difference between revisions of "SUNScholar/SQL Tips"
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;Extract metadata | ;Extract metadata | ||
| − | + | *SELECT * FROM metadatavalue WHERE metadata_field_id = ( SELECT metadata_field_id FROM metadatafieldregistry WHERE element = 'date' AND qualifier = 'issused' ) | |
| − | + | *SELECT * FROM metadatavalue WHERE metadata_field_id = ( SELECT metadata_field_id FROM metadatafieldregistry WHERE element = 'contributor' AND qualifier = 'advisor' ) | |
;Find short dates | ;Find short dates | ||
| − | + | *SELECT * FROM metadatavalue,metadatafieldregistry WHERE metadatavalue.metadata_field_id = metadatafieldregistry.metadata_field_id AND element = 'date' AND qualifier = 'accessioned' AND CHAR_LENGTH(text_value) < 10; | |
;Empty date | ;Empty date | ||
| − | + | *SELECT item_id FROM metadatavalue WHERE metadata_field_id = ( SELECT metadata_field_id FROM metadatafieldregistry WHERE element = 'date' AND qualifier = 'accessioned' ) AND text_value = ''; | |
;Empty type | ;Empty type | ||
| − | SELECT item_id FROM metadatavalue WHERE metadata_field_id = ( SELECT metadata_field_id FROM metadatafieldregistry WHERE element = 'type') AND text_value = ''; | + | *SELECT item_id FROM metadatavalue WHERE metadata_field_id = ( SELECT metadata_field_id FROM metadatafieldregistry WHERE element = 'type') AND text_value = ''; |
Revision as of 15:45, 22 September 2014
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Below are SQL statements to be used for various purposes.
- Extract metadata
- SELECT * FROM metadatavalue WHERE metadata_field_id = ( SELECT metadata_field_id FROM metadatafieldregistry WHERE element = 'date' AND qualifier = 'issused' )
- SELECT * FROM metadatavalue WHERE metadata_field_id = ( SELECT metadata_field_id FROM metadatafieldregistry WHERE element = 'contributor' AND qualifier = 'advisor' )
- Find short dates
- SELECT * FROM metadatavalue,metadatafieldregistry WHERE metadatavalue.metadata_field_id = metadatafieldregistry.metadata_field_id AND element = 'date' AND qualifier = 'accessioned' AND CHAR_LENGTH(text_value) < 10;
- Empty date
- SELECT item_id FROM metadatavalue WHERE metadata_field_id = ( SELECT metadata_field_id FROM metadatafieldregistry WHERE element = 'date' AND qualifier = 'accessioned' ) AND text_value = ;
- Empty type
- SELECT item_id FROM metadatavalue WHERE metadata_field_id = ( SELECT metadata_field_id FROM metadatafieldregistry WHERE element = 'type') AND text_value = ;
