Question

我有一个旧的帮助台票务系统，我的任务是将数据移出我们的新票务系统。这是我正在运行的查询：

DROP TABLE IF EXISTS final_table;

CREATE TABLE final_table (
    name varchar(40), 
    ticketID BIGINT, 
    ticket_id BIGINT,
    subject varchar(255), 
    priority_id varchar(10), 
    status varchar(10), 
    updated DATE, 
    created DATE,
    closed DATE,
    response LONGTEXT
);

ALTER TABLE final_table ADD PRIMARY KEY(ticket_id);

INSERT INTO final_table
SELECT      name, ticketID, ticket_id, subject, priority_id, status, updated, created, closed, response
FROM        ost_ticket;

ALTER TABLE final_table ADD response LONGTEXT;
ALTER TABLE final_table ADD impact varchar(40);
ALTER TABLE final_table ADD category varchar(20);
ALTER TABLE final_table ADD queue varchar (20);

UPDATE final_table SET impact = "1 person can't work";
UPDATE final_table SET category = "Other";
UPDATE final_table SET queue = "Help Desk";

INSERT INTO final_table( response )
SELECT      GROUP_CONCAT(ost_ticket_response.response SEPARATOR "\n\n") AS response
FROM        ost_ticket_response
GROUP BY    ost_ticket_response.ticket_id;

旧的票务软件在ost_ticket_response表中多次列出PK，因此需要在最后四行中进行GROUP_CONCAT调用。基本上我正在尝试组合具有相同ticket_id的条目，然后将其拉入我正在创建的临时表中。如果我按现在运行查询，它只会使用null结果填充响应列。有什么想法吗？

GROUP_CONCAT创建NULL Entry

0 个答案: