0

我有这个查询：

SELECT
  tud.detail_company_name AS company_name,
  tud.detail_country AS company_country,
  trv.review_title AS review_title
FROM users_detail tud
INNER JOIN users_auth tua
  ON tud.user_id = tua.user_id
LEFT JOIN reviews trv
  ON tud.user_id = trv.review_company_id
WHERE
  tua.auth_user_type = "company" OR tua.auth_user_type = "guestcompany"

查询工作正常，它返回如下结果：

Array
(
    [0] => Array
        (
            [company_name] => The Coffee Brewery
            [company_country] => US
            [review_title] => 
        )
    [1] => Array
        (
            [company_name] => Crea Nail Art Studio
            [company_country] => SG
            [review_title] => 
        )
    [2] => Array
        (
            [company_name] => Hello Mall
            [company_country] => JP
            [review_title] => Fake goods!
        )
    [3] => Array
        (
            [company_name] => Hello Mall
            [company_country] => JP
            [review_title] => Never buy in there!
        )
)

正如您所注意到的，数组键 2 和 3 具有相同的company_name但不同的review_title。有没有可能它必须加入一个结果并用逗号分隔？例如说这个结果：

Array
(
    [0] => Array
        (
            [company_name] => The Coffee Brewery
            [company_country] => US
            [review_title] => 
        )
    [1] => Array
        (
            [company_name] => Crea Nail Art Studio
            [company_country] => SG
            [review_title] => 
        )
    [2] => Array
        (
            [company_name] => Hello Mall
            [company_country] => JP
            [review_title] => Fake goods!, Never buy in there!
        )
)

编辑

如果响应是这样的：

Array
(
    [0] => Array
        (
            [company_name] => The Coffee Brewery
            [company_country] => US
            [review_title] => 
            [review_approved] =>
        )
    [1] => Array
        (
            [company_name] => Crea Nail Art Studio
            [company_country] => SG
            [review_title] => 
            [review_approved] =>
        )
    [2] => Array
        (
            [company_name] => Hello Mall
            [company_country] => JP
            [review_title] => Fake goods!
            [review_approved] => 1
        )
    [3] => Array
        (
            [company_name] => Hello Mall
            [company_country] => JP
            [review_title] => Never buy in there!
            [review_approved] => 0
        )
)

如何在review_title 中不包含0 review_approved GROUP_CONCAT？那么它会像这样输出吗？

Array
(
    [0] => Array
        (
            [company_name] => The Coffee Brewery
            [company_country] => US
            [review_title] => 
        )
    [1] => Array
        (
            [company_name] => Crea Nail Art Studio
            [company_country] => SG
            [review_title] => 
        )
    [2] => Array
        (
            [company_name] => Hello Mall
            [company_country] => JP
            [review_title] => Fake goods!
        )
)
4

1 回答 1

2

是的。使用GROUP_CONCAT()：

SELECT
  tud.detail_company_name AS company_name,
  tud.detail_country AS company_country,
  GROUP_CONCAT(trv.review_title SEPARATOR ',') AS review_titles
FROM users_detail tud
INNER JOIN users_auth tua
  ON tud.user_id = tua.user_id
LEFT JOIN reviews trv
  ON tud.user_id = trv.review_company_id
WHERE
  tua.auth_user_type = :company OR tua.auth_user_type = :guestcompany
GROUP BY 
    tud.detail_company_name,
    tud.detail_country;
于 2012-12-26T07:01:37.623 回答