php – mysql – 如何将主查询值传递给子查询中的连接

我有以下查询(嗯…让我烦恼的部分)：

SELECT disTINCT `serv`.`id`, `serv`.`name`, `prj`.`id` AS `idProject`, `prj`.`name` AS `projectName`, `units`.`id` AS `idUnit`,
    `units`.`name` AS `unitName`, `units`.`description` AS `unitDescription`, `units`.`descriptionLong` AS `unitLongDescription`,
    `units`.`address`, `units`.`telephone`, (
        SELECT disTINCT GROUP_CONCAT(CONCAT(`subserv`.`id`, '|', `subserv`.`name`, '|', `links`.`continuous`))
        FROM `" . DBT_SERV . "` AS `subserv`
        JOIN `" . DBT_SERV_LINKS . "` AS `links` ON (
            `links`.`deleted` = 0 AND
            `links`.`idProject` = `serv`.`idProject` AND
            `links`.`mandatory` = '1' AND
            `links`.`subserviceLink` = 1 AND
            `links`.`serviceFrom` LIKE CONCAT ('|', `serv`.`id`,'|') AND
            `links`.`serviceto` LIKE CONCAT('|', `subserv`.`id`, '|')
        )
        WHERE `idParentService` = `serv`.`id`
            AND `subserv`.`deleted` = 0
            AND `subserv`.`onSaleStatus` = 'onSale'
            AND `subserv`.`serviceGroup` = 'SS'
    ) AS `subservices`, (
        SELECT `file`
        FROM `" . DBT_galLERY . "` AS `gallery`
        WHERE `gallery`.`category` = 'accommodationUnit'
            AND `idobject` = `idUnit`
        LIMIT 1
    ) AS `picture`
FROM `" . DBT_SERV . "` AS `serv`

ETC.,ETC ……一些更多的联合和一个地方.

我的问题是我收到以下错误：#1054 – ‘on子句’中的未知列’serv.idProject’

如果我删除links.idProject = serv.idProject我得到#1054 – ‘on子句’中的未知列’serv.id =’.

基本上……我在ON子句中看不到serv中的任何内容.如果我删除整个JOIN查询工作,那么在WHERE子句中serv是可见的.知道如何让它在ON子句中工作吗？

解决方法:

试试这个

SELECT disTINCT `serv`.`SID`, `serv`.`SNAME`, `serv`.`SIDP`, `prj`.`id` AS `idProject`,
`prj`.`name` AS `projectName`, `units`.`id` AS `idUnit`,
`units`.`name` AS `unitName`, `units`.`description` AS `unitDescription`,
`units`.`descriptionLong` AS `unitLongDescription`, `units`.`address`, 
`units`.`telephone`,
    (
        SELECT disTINCT GROUP_CONCAT(CONCAT(`subserv`.`id`, '|', `subserv`.`name`, '|', `links`.`continuous`))
        FROM `" . DBT_SERV . "` AS `subserv`
        JOIN `" . DBT_SERV_LINKS . "` AS `links` ON (
            `links`.`deleted` = 0 AND
            `links`.`idProject` = `serv`.`SIDP` AND
            `links`.`mandatory` = '1' AND
            `links`.`subserviceLink` = 1 AND
            `links`.`serviceFrom` LIKE CONCAT ('|', `serv`.`SID`,'|') AND
            `links`.`serviceto` LIKE CONCAT('|', `subserv`.`id`, '|')
        )
        WHERE `idParentService` = `serv`.`SID`
            AND `subserv`.`deleted` = 0
            AND `subserv`.`onSaleStatus` = 'onSale'
            AND `subserv`.`serviceGroup` = 'SS'
    ) AS `subservices`, (
        SELECT `file`
        FROM `" . DBT_galLERY . "` AS `gallery`
        WHERE `gallery`.`category` = 'accommodationUnit'
            AND `idobject` = `idUnit`
        LIMIT 1
    ) AS `picture`
FROM 
    (SELECT `id` AS `SID`, `idProject` AS `SIDP`, `name` AS `SNAME` FROM `" . DBT_SERV . "`) AS serv
ETC., ETC... some more joins and a where.

SID,SNAME和SIDP别名在主体查询中定义,因此它应该可以访问subquerys.