Multiply sum columns in a pivot query with another column - sql-server

Question

I have three tables, SUsers, Questions, and Votes.
-SUsers- have columns:
SID,SHName,EmailAdd,Password,DoneVoting,AccessLevel, and NumberOfShares
-Questions- have columns: QID, and Questions.
-Votes- have columns: VID, SID, QID, VoteDate, and Answer.
The questions are answerable by "In Order", "Against", and "Abstain."
For example, I have user 1 who have NumberOfShares of 100. The user's one vote will be multiplied by 100.
Currenty, I have this working stored procedure that only gets one vote per user. I'm having a difficulty of multiplying it with the NumberOfShares.
Here's my stored proc.
ALTER PROCEDURE [dbo].[sp_VotingTally2]
#dateFrom NVARCHAR(MAX),
#dateTo NVARCHAR(MAX)
AS
BEGIN
-- SET NOCOUNT ON added to prevent extra result sets from
-- interfering with SELECT statements.
SET NOCOUNT ON;
DECLARE #columns VARCHAR(MAX)
SELECT #columns = COALESCE(#columns + ',','') + QUOTENAME([QID])
FROM (SELECT [QID] FROM [PressRelease].[dbo].[Questions]) st
ORDER BY st.[QID]
DECLARE #sql NVARCHAR(MAX)
SET #sql =
'SELECT * FROM (
SELECT b.[QID],[Answer],[Answer] as Answers FROM [PressRelease].[dbo].[Votes] a INNER JOIN [PressRelease].[dbo].[Questions] b ON a.QID = b.QID
WHERE [VoteDate] >= CAST('''+ #dateFrom +''' AS DATETIME2) AND [VoteDate] <= CAST('''+ #dateTo +'''AS DATETIME2)
) t
PIVOT
(
COUNT([Answer])
FOR [QID] in (' + #columns + ')
) p
'
EXECUTE sp_executesql #sql
END
Here's the result of this stored proc
I've been trying different approach but all I get is error to get what I want. I would like to multiply all the numbers in these columns to a number from a column in my other table. The column is NumberOfShares. For every voter, they have their number of shares that would be needed to multiply to their votes. I hope you could help me with this.

Answer 1

First let's fix your query first. This part:
SET #sql = '
SELECT ' + #columns + '
FROM (
SELECT b.[QID], a.[Answer]
FROM [PressRelease].[dbo].[Votes] a
INNER JOIN [PressRelease].[dbo].[Questions] b ON a.QID = b.QID
WHERE a.[VoteDate] >= #dFrom AND a.[VoteDate] <= #dTo
) t
PIVOT(COUNT([Answer]) FOR [QID] in (' + #columns + ')) p
'
EXEC sp_executesql #sql, N'#dFrom datetime, #dTo datetime', #dFrom = #dFrom, #dTo = #dTo;
So what do you want to multiply by what?

Answer 2

It would be better to give the structure of that secret table you want to join and multiply but let's assume this is a "Voters" table:
SET #sql = '
SELECT [Answer], ' + #columns + '
FROM (
SELECT a.[Answer], b.[QID], v.[NumberOfShares]
FROM [PressRelease].[dbo].[Votes] a
INNER JOIN [PressRelease].[dbo].[Questions] b ON a.QID = b.QID
INNER JOIN [PressRelease].[dbo].[Voters] v ON a.VoterID = v.VoterID
WHERE a.[VoteDate] >= #dFrom AND a.[VoteDate] <= #dTo
) t
PIVOT(SUM([NumberOfShares]) FOR [QID] in (' + #columns + ')) p
'
EXEC sp_executesql #sql, N'#dFrom datetime, #dTo datetime', #dFrom = #dFrom, #dTo = #dTo;