使用 Yii2 ActiveRecord 在 SELECT 中带有大小写的子查询

Question

是否可以在 Yii2 中将这种 SQL 转换为 ActiveRecord 查询：

SELECT a.id, 
    case length(a.id)
            when 6 then (select region_name from region where id = concat(left(a.id,2),'0000'))
            when 5 then (select region_name from region where id = concat(left(a.id,1),'0000'))
    end as prov,
    case length(a.id)
            when 6 then (select region_name from region where id = concat(left(a.id,4),'00'))
            when 5 then (select region_name from region where id = concat(left(a.id,3),'00'))
    end as kab,
   (select region_name from region where id = a.id) as kec
FROM region as a 
WHERE a.region_name LIKE '%kamb%'

Answer 1

绝对将其转换为查询构建

$query = new \yii\db\Query;
$query->from("region as a ");
$query->select(new \yii\db\Expression("a.id, 
    case length(a.id)
            when 6 then (select region_name from region where id = concat(left(a.id,2),'0000'))
            when 5 then (select region_name from region where id = concat(left(a.id,1),'0000'))
    end as prov,
    case length(a.id)
            when 6 then (select region_name from region where id = concat(left(a.id,4),'00'))
            when 5 then (select region_name from region where id = concat(left(a.id,3),'00'))
    end as kab,
    (select region_name from region where id = a.id) as kec"));
$query->andWhere(['like', 'a.region_name', 'kamb']);
echo $query->createCommand()->rawSql;

如果是 ActiveRecord 查询，请替换上面的选择部分