我将如何在 Codeigniter ActiveRecord 中执行以下查询:-
SELECT *,
(SELECT
image_path
FROM
image
WHERE
image_table = 'model'
AND image_table_id = model_id
GROUP BY image_table_id
LIMIT 1) AS ModelImg
FROM
(SELECT
*
FROM
vw_newcars
where offer_table = 'derivative'
order by offer_order
) x
WHERE make_name = 'Fiat'
group by offer_table_id
limit 12
我遇到问题的部分是如何从 Active Record 中的子查询中进行选择。
我没有看到from_select
函数或文档中类似的内容。
我设法通过将from
sub_query 进入初始 select 语句:
$this->db->select("*,
(select image_path from image where image_table = 'model' and image_table_id = model_id
group by image_table_id limit 1) as ModelImg FROM
(SELECT * FROM $view where offer_table = 'derivative' order by offer_order) x");
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