Question

我有两个表 - 一个主表，一个表（即一对多表）。我从一个可怕的架构导入数据，数据的一个特点是我经常有一些细节记录，但没有掌握。

如何在这些情况下插入主记录？我可以使用此查询轻松找到丢失的母版：

select * from p_ltx_surgical_comp as c -- detail
left join p_ltx_surgical as s -- master
on c.fk_oid = s.fk_oid -- this is the key
where s.oid is null -- primary key, so null means no record exists
group by c.fk_oid; -- only show one value even if there are multiple detail records

哦，作为一个额外的皱纹，我只想插入一个主人，即使有多个细节记录。

Answer 1

您可以从这个INSERT查询开始：

INSERT INTO p_ltx_surgical (fk_oid)
SELECT DISTINCT c.fk_oid
FROM
  p_ltx_surgical_comp AS c
  LEFT JOIN p_ltx_surgical AS s
  ON c.fk_oid = s.fk_oid
WHERE
  s.oid IS NULL

您可以在表格中添加更多详细信息，例如：

INSERT INTO p_ltx_surgical (fk_oid, description, ...)
SELECT DISTINCT c.fk_oid, 'missing record', ...
FROM
   ...

Answer 2

啊，我太近了......这似乎有用了：

insert into p_ltx_surgical (oid, fk_oid, ltx_surg_date)
select sp_getvdtablekey('p_ltx_surgical', 0), c.fk_oid, '1900-01-01' from
p_ltx_surgical_comp as c -- detail
left join p_ltx_surgical as s -- master
on c.fk_oid = s.fk_oid -- this is the key
where s.oid is null
group by c.fk_oid; -- primary key, so null means no record exists

当详细记录存在但缺少主数据时插入主表

2 个答案: