Question

我正在使用PostgreSQL客户记录。

我的任务是导出客户记录。

除了有联系信息的客户，我还有另一张桌子。

每行一个联系人项目（电话，价值或电子邮件，价值等）。

当我加入并关联数据时，我会为每个客户ID提取多条记录（如果每个客户的通信类型超过1个，例如手机和电子邮件）。

我怎样才能为每个通讯类型创建另一行，将信息放入临时列，如电话列，传真列和电子邮件列 - 然后每个客户只有一行。

编辑 - 你们是主人

带列的数据库表：

account {
  id
  accountid
  title (company name?)
  shiptoaddress_id (links to address table)
  billtoaddress_id (links to address table)
}

address {
  city
  country
  state
  name (company name?)
  street1
  street2
  street3
  zip
  id
}

comlink {
  isdeleted
  type [Phone,Fax,E-mail,Cell,IM,FaceBook,Twitter,LinkedIn,Web Site,Other]
  value
  id
  party_id (links to party table)
}

party {
  isdeleted [t,f]
  firstname
  lastname
  prefix
  salutation
  suffix
  id
  address_id
  jobtitle_id
}

party_comlinks {
  party_id (links to party table ex: fname lname...)
  comlinks_id (links to comlink table phone, email, etc 1 item per row)
}

所以我想做的是用以下数据吸引所有客户：

customer.id，customer.accountid，customer.title，shipping.name，shipping.street1，shipping.street2，shipping.street3，shipping.city，shipping.state，shipping.zip，billing.name，billing.street1 （etc），billing.city，billing.state，billing.zip，party.contactperson（as party.firstname + party.lastname）并且有电话，电子邮件，传真

我不确定这是否可行，因为在系统中我认为您可以拥有多个送货信息，结算信息，每个客户的联系信息...但是每个送货信息和结算信息都相同，我只需要一排电话，电子邮件，传真等，而不是每行，电子邮件，传真等多行。

清楚如泥，对吗？： - ）

编辑 - 可能现在已经获得了，但仍然会感激输入

SELECT account.id, account.accountid, account.status, account.title AS "customer",
party.firstname AS "firstname", party.lastname as "lastname", address.name AS "billname",
address.street1 AS "billtostreet1", address.street2 AS "billtostreet2", address.city as "billtocity",
address.state AS "billtostate", address.zip AS "billtozip", address2.name AS "shiptoname",
address2.street1 as "shiptostreet1", address2.street2 AS "shiptostreet2", address2.city AS "shiptocity",
address2.state AS "shiptostate", address2.zip AS "shiptozip", 

((SELECT a.value 
FROM public.comlink a, party_comlinks b
WHERE b.party_id=party.id AND b.comlinks_id=a.id AND a.type='Phone')) AS "phone",

((SELECT a.value 
FROM public.comlink a, party_comlinks b
WHERE b.party_id=party.id AND b.comlinks_id=a.id AND a.type='Fax')) AS "fax",

((SELECT a.value 
FROM public.comlink a, party_comlinks b
WHERE b.party_id=party.id AND b.comlinks_id=a.id AND a.type='E-Mail')) AS "email"

FROM  ( public.account account 
   INNER JOIN public.party party ON account.contact_id = party.id )  
   INNER JOIN public.comlink comlink ON party.id = comlink.party_id 
   INNER JOIN public.address address ON account.billtoaddress_id = address.id
   INNER JOIN public.contact contact ON account.contact_id = contact.id
   LEFT JOIN public.contact_shiptoaddress contact_shiptoaddress ON contact.id = contact_shiptoaddress.contact_id
   LEFT JOIN public.address address2 ON contact_shiptoaddress.shiptoaddress_id = address2.id



WHERE account.isdeleted = 'f'

--WHERE ((comlink.type = 'E-Mail')) 
    --AND ((account.walkin is null OR (NOT ( account.walkin ))))
    --AND ((NOT ( (account."status" = 'CustomerStatusInactive') )))
    --AND ((account."prospect" is null
    --OR (NOT ( account."prospect" )))) 

ORDER BY account.id ASC

实际上，INNER JOIN并不是我需要的......我需要按照以下说明进行LEFT JOIN。

Answer 1

您必须多次明确加入联系人表格，这样做。现在有了一种动态的方式＆＃34;输出列集取决于数据。

示例：

SELECT customers.name, phone_contacts.value AS phone, fax_contacts.value AS fax, ...
FROM customers
  LEFT JOIN (SELECT * FROM contacts WHERE contact_type = 'phone') AS phone_contacts ON ...
  LEFT JOIN (SELECT * FROM contacts WHERE contact_type = 'fax') AS fax_contacts ON ...

PostgreSQL - 创建临时列而不是多行

1 个答案: