Question

我正在尝试从表中复制数据并使用一些不同的字段插入其中。这里插入它时导致一个问题，我必须指定id（主键），它应该是自动递增但由于某种原因在创建表时没有设置为serial。我希望根据已存在的数据在要插入的数据中添加递增ID。

任何帮助将不胜感激。

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                       for u in item['Urls']
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更新：

之前执行选择查询意味着要插入，取得以下结果。

WITH my_admin_id AS
(
  SELECT id
  FROM dashboard_admin
  WHERE email = 'someone@somedomain.com'
),
get_admin AS
(
  SELECT id
  FROM dashboard_admin
  WHERE user_id IN (SELECT id FROM auth_user WHERE username = 'demo')
),
get_admin_projects AS
(
  SELECT *
  FROM dashboard_project
  WHERE admin_id IN (SELECT * FROM get_admin LIMIT 1)
  AND   is_deleted = 'false'
) INSERT INTO dashboard_project
(
  SELECT id,
  name,
  created_date,
  (SELECT * FROM my_admin_id LIMIT 1)AS admin_id,
  category_id,
  subcategory_id,
  is_deleted FROM get_admin_projects
)

这里我刚刚添加了一个查询来获取最大ID。我只需要为最终选择查询中的每条记录增加它。

67  1stAd   2017-04-21 15:25:16.430889  100 18  47  false
71  2stAd   2017-05-12 10:18:55.383967  100 34  90  false

这是执行选择查询的结果值。

WITH my_admin_id AS
(
  SELECT id
  FROM dashboard_admin
  WHERE email = 'someone@somedomain.com'
),
get_admin AS
(
  SELECT id
  FROM dashboard_admin
  WHERE user_id IN (SELECT id FROM auth_user WHERE username = 'demo')
),
get_max_project AS
(
  SELECT MAX(id) FROM dashboard_project
),
get_admin_projects AS
(
  SELECT id,
         name,
         created_date,
         admin_id,
         category_id,
         subcategory_id,
         is_deleted
  FROM dashboard_project
  WHERE admin_id IN (SELECT * FROM get_admin LIMIT 1)
  AND   is_deleted = 'false'
) (SELECT (SELECT * FROM get_max_project) id,
       name,
       created_date,
       (SELECT * FROM my_admin_id LIMIT 1) AS admin_id,
       category_id,
       subcategory_id,
       is_deleted
FROM get_admin_projects)

Answer 1

最后让它像这样工作使用了我添加到max id的row_number（）窗口函数，以增加高于最大id的值。

WITH my_admin_id AS
(
  SELECT id
  FROM dashboard_admin
  WHERE email = 'someone@somedomain.com'
),
get_admin AS
(
  SELECT id
  FROM dashboard_admin
  WHERE user_id IN (SELECT id FROM auth_user WHERE username = 'demo')
),
get_max_project AS
(
  SELECT MAX(id) FROM dashboard_project
),
get_admin_projects AS
(
  SELECT id,
         name,
         created_date,
         admin_id,
         category_id,
         subcategory_id,
         is_deleted
  FROM dashboard_project
  WHERE admin_id IN (SELECT * FROM get_admin LIMIT 1)
  AND   is_deleted = 'false'
) 
insert into dashboard_project (SELECT ((SELECT * FROM get_max_project)  + row_number() over ()) as id,
       name,
       created_date,
       (SELECT * FROM my_admin_id LIMIT 1) AS admin_id,
       category_id,
       subcategory_id,
       is_deleted
FROM get_admin_projects)

通过递增id从select查询创建插入查询

1 个答案: