Question

我收到了以下请求。

请将每位销售人员登记的当前联系人的7％提供给新的销售助理（'Peter'）。

我决定做的是获取每位销售助理的总记录，并计算7％的记录。

例如大卫有200个 200/7％= 14

SELECT TOP 14 ContactAssociate
FROM tb_Contact 
WHERE tb_Contact.ContactAssociate = 'David' 
ORDER BY NEWID()

现在，我可以选择数据，但我正在努力更新它们; 我以为这会做到但却没有快乐。

UPDATE tb_Contact
SET ContactAssociate = 'Peter'
IN
(
SELECT TOP 14 ContactAssociate
FROM tb_Contact 
WHERE tb_Contact.ContactAssociate = 'David' 
ORDER BY NEWID()
)

任何想法，我出错了？任何帮助，非常感谢。

Answer 1

试试这个：

UPDATE c
SET ContactAssociate = 'Peter'
FROM tb_Contact c
INNER JOIN (
  SELECT TOP 14 ContactAssociate FROM tb_Contact 
  WHERE tb_Contact.ContactAssociate = 'David' 
) q ON c.ContactAssociate = q.ContactAssociate

如果您想尝试更新所需的记录，可以这样做：

SELECT c.*
FROM tb_Contact c
INNER JOIN (
  SELECT TOP 14 ContactAssociate FROM tb_Contact 
  WHERE tb_Contact.ContactAssociate = 'David' 
) q ON c.ContactAssociate = q.ContactAssociate

如您所见，更新或检查之间的唯一变化是FROM子句之前的行。

Answer 2

为什么不使用TOP 7 PERCENT或TOP 7 PERCENT WITH TIES？

DECLARE @sample int
SET @sample = 7

UPDATE tb_Contact
SET ContactAssociate = 'Peter'
where PK_Of_tb_Contact
IN
(
SELECT TOP (@sample) PERCENT PK_Of_tb_Contact
FROM tb_Contact 
WHERE tb_Contact.ContactAssociate = 'David' 
ORDER BY NEWID()
)

Answer 3

PK_Of_tb_Contact - tb_Contact表中的主键

UPDATE tb_Contact
SET ContactAssociate = 'Peter'
where PK_Of_tb_Contact
IN
(
SELECT TOP 14 PK_Of_tb_Contact
FROM tb_Contact 
WHERE tb_Contact.ContactAssociate = 'David' 
ORDER BY NEWID()
)

更新sqlserver中的数据子集

3 个答案: