SQL自動遞增具有多個插入的值

Question

我們有一個針對SQL Server 2008數據庫執行的SQL查詢。

INSERT INTO ListDetail(ListID, Sequence, CompName, CompAddress, Date)
(
 SELECT
   12345 AS 'ListID',
   (MAX(ListDetail.Sequence) + 1) AUTO_INCREMENT as 'Sequence',
   Company.Name AS 'CompName',
   Company.Address AS 'CompAddress',
   GETDATE() AS 'Date'
 FROM Company
 WHERE CompanyType = 3
)

我們要從ListDetail表中找到最大序列。然后從Company表中選擇記錄到ListDetail中。 但是，我們要從ListDetail中的下一個可用Sequence值開始，然后為插入的每個記錄加1。 ListDetail中的Sequence字段只是常規的INT字段。

我們無法控制數據庫本身...因此無法創建新表或更改現有表。

Answer 1

一種選擇是將Row_Number()與返回max()的子查詢一起使用：

簡化解決方案：

insert into ListDetail 
select 12345, sq+row_number() over (order by (select null))
from company, (select max(sequence) sq from listdetail) t

• SQL小提琴演示

---

INSERT INTO ListDetail(ListID, Sequence, CompName, CompAddress, Date)
SELECT
   12345,
   sq+row_number() over (order by (select null)),
   Name,
   Address,
   GETDATE()
FROM Company, (select max(sequence) sq from listdetail) t
WHERE CompanyType = 3

Answer 2

這樣的簡單方法應該適合您。

INSERT INTO ListDetail(ListID, Sequence, CompName, CompAddress, Date)
(
 SELECT
 12345,
 (SELECT MAX(Sequence) + 1 FROM ListDetail),
 Company.Name,
 Company.Address,
 GETDATE()
 FROM Company
 WHERE CompanyType = 3
)