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我的整个查询有点复杂,所以我将尝试显示您需要了解我的问题,我正在从数据库中获取票证,它显示标题、创建者、负责票证的人,以及最后一个更新者,对于创建者和负责人,我找到他们IDtickets_users.users_id类型和类型 1 或 2,这取决于他们是票的创建者还是负责人,标题和票本身的所有信息表现在为用户命名tickets,他们的 ID,他们的名字等等users

所以我的查询看起来像这样:

SELECT
tickets.id,
    tickets.name,
    GROUP_CONCAT(
            CASE WHEN tickets_users.type = 1 THEN 
                        CONCAT(users.firstname, ' ', users.realname)
            END) AS creator,
    GROUP_CONCAT(
            CASE WHEN tickets_users.type = 1 THEN 
                        CONCAT(tickets_users.users_id)
            END) AS creator_id,
    GROUP_CONCAT(
            CASE WHEN tickets_users.type = 2 THEN 
                        CONCAT(users.firstname, ' ', users.realname)
            END) AS in_charge,
    GROUP_CONCAT(
            CASE WHEN tickets_users.type = 2 THEN 
                        CONCAT(tickets_users.users_id)
            END) AS in_charge_id,
    tickets.date,
    tickets.priority,
    tickets.date_mod,
    tickets.status,
    tickets.users_id_lastupdater,
MAX(CASE WHEN tickets.users_id_lastupdater = users.id
         THEN CONCAT(users.firstname, ' ', users.realname) 
    END) AS last_updater,
tickets.content
FROM
    tickets
    JOIN tickets_users ON tickets_users.tickets_id = tickets.id
    JOIN users ON users.id = tickets_users.users_id
    WHERE tickets.id = ?");

我的问题是JOIN users ON users.id = tickets_users.users_id它适用于负责人和创建者,但如果不是负责人回复或修改票证,他将不会出现在“最后修改者”中,因为last_updater ID它在表格中tickets。我尝试加入,JOIN users ON (users.id = tickets_users.users_id AND , glpi_tickets.users_id_lastupdater)但没有成功。有任何想法吗?

4

1 回答 1

1
ON users.id IN (tickets_users.users_id, tickets.last_updater)

您需要将测试添加AND users.id = tickets_users.users_id到您的CASE语句中

工作,谢谢eggyal

于 2013-07-23T12:42:39.053 回答