Question

我目前有2张票证表。表1是门票，表2是回复。

我目前正在做

select id, subject, description 
from tickets 
where subject like '%hello%';

这有效，但我也希望返回相同的字段，但hello与response表中的message字段匹配。

E.g。我希望我能做到：

select id, subject, description 
from tickets, responses 
where tickets.subject like '%hello%' OR responses.message like '%hello%';

响应表中的

ticketid与故障单表中的id相同。

Answer 1

如果我理解正确，你只想要票表的结果？您可以使用tableName.*或使用tableName.columnName来获取原始表中的结果。

select tickets.id, tickets.subject, tickets.description 
from tickets, responses 
where tickets.id = responses.id
AND (tickets.subject like '%hello%' 
OR responses.message like '%hello%')

Answer 2

您可能需要左连接 -

select id, subject, description 
from tickets left join responses on tickets.id = responses.ticketid
where tickets.subject like '%hello%' OR responses.message like '%hello%';

[更正] LEFT JOIN

Answer 3

您需要加入表格：

SELECT `tickets`.`id`, `tickets`.`subject`, `tickets`.`description`, `responses`.`message` 
LEFT JOIN `responses` ON `tickets`.`id` = `responses`.`id` 
WHERE `tickets`.`subject` like '%hello%' OR responses.message like '%hello%'

Answer 4

如果总会有回复记录：

  select tickets.id, tickets.subject, tickets.description 
  from tickets, responses 
  where
    tickets.id = responses.id and
    ( tickets.subject like '%hello%' or 
      responses.message like '%hello%' )

如果门票可以无响应而存在：

  select tickets.id, tickets.subject, tickets.description 
  from tickets left outer join responses on tickets.id = responses.id
  where
    tickets.subject like '%hello%' or 
    responses.message like '%hello%'

SQL - 搜索2个表并从中返回结果

4 个答案: