Question

我需要根据表中的行数和名为＆＃39; users＆＃39;的表中的用户数，将一个表中相同数量的记录插入另一个表中。例如，如果一个表'退款_上传＆＃39;有100条记录和表＆＃39;用户＆＃39;有10个用户，然后我想将所有100行插入表格＆＃39;退款＆＃39;并为每个UserID分配10条记录。

目前，我只是这样做

INSERT Refunds
    (BorrowerNumber, UserID)
    SELECT BorrowerNumber, 'unknown' FROM Refunds_Upload

这是需要发生什么的概述

 --get the list of users from the Users table
SELECT UserID FROM Users

--determine how many refunds each user gets
Declare @RefundsPerUser int
SET @RefundsPerUser = ROUND((SELECT COUNT(*) FROM Users) / (SELECT COUNT(*) FROM Refunds_Upload),2)

--For each UserID in Step 1...
INSERT INTO Refunds @RefundsPerUser INTO Refunds

Answer 1

我不能说你在做什么是有道理的，但是你会怎么做：

WITH refund_amt(amt) AS
(
  SELECT ROUND(COUNT(*)/MAX(RU.C),2) AS AMT
  FROM Users
  CROSS JOIN (SELECT COUNT(*) AS C FROM Refunds_Upload) RU
)
INSERT INTO Refunds (BorrowerNumber, UserID)
  SELECT UserID, refund_amt.amt
  FROM Users
  CROSS JOIN refund_amt

将一个表中的动态数量的记录插入另一个表中

1 个答案: