在SQL Server 2008中填充表时对两列使用SUM函数时返回空值

INSERT INTO table正在为返回的记录集生成空值。我试图从pffinancial表中添加SUMm.earnings+m.fpearn，从userbase表中添加userid&minpay

我做错了什么？还有没有更好的方法通过id的临时表进行重申

从下表中，我应该使用每个用户id的一个唯一id、来自用户库的minpay金额和来自PFFinancial表的m.Incomes+m.fpearn列的总和填充publsher_monthly表

出版商月刊表

用户基表

p财务表

我的问题是：

DECLARE @realuserid bigint

CREATE TABLE #tmppmuserids(
   idx bigint Primary Key IDENTITY(1,1),
   tmppmuserid bigint NULL
)

INSERT INTO #tmppmuserids
  SELECT DISTINCT userid FROM pfinancial

DECLARE @i bigint
DECLARE @numrows bigint

SET @i = 1
SET @numrows = (SELECT COUNT(*) FROM #tmppmuserids)

IF @numrows > 0

WHILE (@i <= (SELECT MAX(idx) FROM #tmppmuserids))
BEGIN
   SET @realuserid = (SELECT tmppmuserid FROM #tmppmuserids WHERE idx = @i)

  --PROBLEM HERE
  INSERT INTO publisher_monthly (pmearnings, pmuserid, pmminpay)

    SELECT  
        SUM(m.earnings + m.fpearn), MAX(@realuserid), MAX(u.minpay) 
    FROM pfinancial m 
    INNER JOIN userbase u on u.userid = m.userid 
    WHERE 
       m.userid = @realuserid AND 
       (m.created >= DATEADD(MONTH, DATEDIFF(MONTH, -1, GETDATE()),0)) AND
       (m.created < DATEADD(MONTH, DATEDIFF(MONTH, -1, GETDATE()) + 1, 0))
  --END PROBLEM

  SET @i = @i + 1
END

SELECT * FROM #tmppmuserids
SELECT * FROM publisher_monthly

DROP TABLE #tmppmuserids

在其周围放置一个IsNull：

SELECT SUM(IsNull(m.earnings, 0) + IsNull(m.fpearn, 0))

甚至围绕整个事件：

SELECT IsNull(SUM(m.earnings + m.fpearn), 0)

---

在返回的值周围放置一个ISNULL会有什么帮助？问题在于返回的是空值。我从中获取数据的列不是空的，但不知何故返回的记录集是空的。我的问题出了点问题。我需要修正这个问题。你应该发布一些样本数据，然后提供一个更清晰的问题图片。只是添加了样本数据。忘了做那件事。对不起，我刚刚使用了您的示例数据和查询，没有得到空结果。数据正在正确加载到publisher_monthly表中。当然，我的数据中没有您创建的字段，所以问题可能就在这里。+1表示在整个表达式周围使用ISNULL，并轻推到10k代表，欢迎加入俱乐部！ツ

DECLARE @realuserid bigint

CREATE TABLE #tmppmuserids(
   idx bigint Primary Key IDENTITY(1,1),
   tmppmuserid bigint NULL
)

INSERT INTO #tmppmuserids
  SELECT DISTINCT userid FROM pfinancial

DECLARE @i bigint
DECLARE @numrows bigint

SET @i = 1
SET @numrows = (SELECT COUNT(*) FROM #tmppmuserids)

IF @numrows > 0

WHILE (@i <= (SELECT MAX(idx) FROM #tmppmuserids))
BEGIN
   SET @realuserid = (SELECT tmppmuserid FROM #tmppmuserids WHERE idx = @i)

  --PROBLEM HERE
  INSERT INTO publisher_monthly (pmearnings, pmuserid, pmminpay)

    SELECT  
        SUM(m.earnings + m.fpearn), MAX(@realuserid), MAX(u.minpay) 
    FROM pfinancial m 
    INNER JOIN userbase u on u.userid = m.userid 
    WHERE 
       m.userid = @realuserid AND 
       (m.created >= DATEADD(MONTH, DATEDIFF(MONTH, -1, GETDATE()),0)) AND
       (m.created < DATEADD(MONTH, DATEDIFF(MONTH, -1, GETDATE()) + 1, 0))
  --END PROBLEM

  SET @i = @i + 1
END

SELECT * FROM #tmppmuserids
SELECT * FROM publisher_monthly

DROP TABLE #tmppmuserids

SELECT SUM(IsNull(m.earnings, 0) + IsNull(m.fpearn, 0))

SELECT IsNull(SUM(m.earnings + m.fpearn), 0)