php - 想要合并两个 sql 查询以获得共同的结果

Question

如果特定 location_id 的以下两个条件都为真，则想要从 location_context 表中获取 location_id

    SELECT location_id 
    FROM location_context 
    WHERE relation_type = '2' 
    AND relation_table = 'locations' 
    AND relation_table_id = '$_GET[cat]' 
    AND is_active = '1'

和

    SELECT location_id 
    FROM location_context 
    WHERE relation_type = '1' 
    AND relation_table = 'locations' 
    AND relation_table_id = '$_GET[pro]' 
    AND is_active = '1'

Answer 1

这是您要查找的查询:

SELECT L.location_id
FROM location_context L
WHERE L.relation_table = 'locations'
    AND L.is_active = '1'
    AND ((L.relation_type = '2' AND L.relation_table_id = '$_GET[cat]')
        OR (L.relation_type = '1' AND L.relation_table_id = '$_GET[pro]'))

希望对你有帮助