使用多个Group Concate Mysql

Question

我有4张桌子

trxn_tbl：

works_id    works_date
1           3/17/2017
2           3/19/2017
3           3/18/2017

apps_txn_tbl：

id  works_id    apps_name
1   1            JoinBDApps
2   1            PMS
3   1            CADET COLLEGE
4   2            JoinBDApps
5   2            PMS
6   2            CADET COLLEGE
7   3            JoinBDApps
8   3            PMS
9   3            CMH

work_loc_trxn_tbl：

id  works_id    loc 
1   1           DC  
2   2           AITSO   
3   3           DR  

works_type_txn_tbl：

    id  works_id  works_type
    1   1         Trobleshooting
    2   1         Software Upgrade
    3   2         Trobleshooting
    4   2         License Key Update
    5   3         Trobleshooting
    6   3         License Key Update

当我运行查询时Mysql说：  MySQL说：文档

1055 - SELECT列表的表达式＃3不在GROUP BY子句中，并且包含非聚合列'dcapp_db.work_loc_txn_tbl.loc'，它在功能上不依赖于GROUP BY子句中的列;这与sql_mode = only_full_group_by

不兼容

但我想要这种类型：

works_id    Works_date   work_type                            appsname                                       loc
1           3/17/2017   Trobleshooting, software upgrade    JoinBDapps, PMS, CADET COLLEGE                       DR
2           3/19/2017    Trobleshooting,  License Key Update    JoinBDapps, PMS, CADET COLLEGE                   AITSO
3           3/18/2017    Trobleshooting,  License Key Update     JoinBDApps, PMS,  CMH                           DR

哪里有问题，我是否需要更改表系统或查询请求帮助我.... 我的查询是：“我的查询是：

SELECT trxn_tbl.works_id, trxn_tbl.works_date,work_loc_txn_tbl.loc,GROUP_CONCAT(works_type_txn_tbl.works_type SEPARATOR ',')as worktype,GROUP_CONCAT(apps_txn_tbl.apps_name SEPARATOR ',')as appname FROM trxn_tbl JOIN works_type_txn_tbl on works_type_txn_tbl.works_id=trxn_tbl.works_id JOIN apps_txn_tbl on apps_txn_tbl.works_id=trxn_tbl.works_id JOIN work_loc_txn_tbl on work_loc_txn_tbl.works_id=trxn_tbl.works_id GROUP BY trxn_tbl.works_id;

“

Answer 1

1. works_id，works_date，loc需要添加到GROUP BY。
2. 您在一个查询中使用了两个GROUP_CONCAT，然后此查询没有 足够的列到GROUP BY，因此GROUP_CONCAT有重复     内容。

试试这个：

SELECT
    trxn_tbl.works_id,
    trxn_tbl.works_date,
    work_loc_txn_tbl.loc,
    GROUP_CONCAT(
        DISTINCT works_type_txn_tbl.works_type SEPARATOR ',' -- add DISTINCT
    ) AS worktype,
    GROUP_CONCAT(
        DISTINCT apps_txn_tbl.apps_name SEPARATOR ',' -- add DISTINCT
    ) AS appname
FROM
    trxn_tbl
INNER JOIN works_type_txn_tbl ON works_type_txn_tbl.works_id = trxn_tbl.works_id
INNER JOIN apps_txn_tbl ON apps_txn_tbl.works_id = trxn_tbl.works_id
INNER JOIN work_loc_txn_tbl ON work_loc_txn_tbl.works_id = trxn_tbl.works_id
GROUP BY
    trxn_tbl.works_id,
    trxn_tbl.works_date,
    work_loc_txn_tbl.loc

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