Sum of multiple values of one variable - sql

Question

I want to sum the variable that is holding the value in a loop,
Here's my table:
name | pkey | cinema1~cinema10 | total_QTy | total_sales
aaa | 1 | 100.00 ~ 200.00 | 2 | 300.00
bbb | 2 | 150.00 ~ 145.00 | 3 | 295.00
total_Qty is the sum of the tickets bought in cinema1~cinema10 for name aaa
and I don't know how to do this. I am only getting the last value of counted ticket which is in name bbb cinema10.
Help me please. I'm stuck here.
Here is my code for getting the amount and qty
WHILE ISNULL(#cinema_key, 0) <> 0
BEGIN
SET #amount = 0
SELECT #amount =(SUM(t1.price)), #qty = (count(t1.cnt))
FROM(
SELECT
(ISNULL(SUM(mctrs.price),0) - (ISNULL(SUM(mctrs.lgu_tax_amount),0) + ISNULL(SUM(mctrs.ordinance_1),0) + ISNULL(SUM(mctrs.ordinance_2),0)+ ISNULL(SUM(mctrs.ordinance_3),0) + ISNULL(SUM(mctrs.ordinance_4),0) )) AS 'price',
count(mctrs.[key]) as 'cnt', mctrs.[key] as ckey
FROM
movie_calendar mc
INNER JOIN
movie_database md
ON
mc.movie_key = md.[key] AND mc.screening_start_date = #tdate
INNER JOIN
cinemas c
ON
mc.cinema_key = c.[key] AND c.[key] = #cinema_key
INNER JOIN
movie_calendar_times mct
ON
mct.movie_calendar_key = mc.[key]
LEFT OUTER JOIN
movie_calendar_time_reserved_seats mctrs
ON
mctrs.movie_calendar_time_key = mct.[key]
INNER JOIN
patrons p
ON
mctrs.patron_key = p.[key]
WHERE mctrs.status = 1 AND mctrs.[committed]=1
GROUP BY p.patron_tag,mctrs.price,P.APPLY_LGU_TAX ,P.LGU_TAX_AMOUNT, mctrs.[key]
)t1
SET #buffer = 'UPDATE #temptable SET cinema'+CAST(#count AS VARCHAR)+' = '+CAST(ISNULL(sum(#amount),0) AS VARCHAR)+' WHERE [date] = '''+CAST (#tdate AS VARCHAR)+''''
PRINT (#buffer)
EXEC(#buffer)
insert into #tqty(qty) values(#qty)
DELETE FROM #cinema_list WHERE cinema_key = #cinema_key
SET #cinema_key = NULL
SET #cinema_code = NULL
SELECT TOP 1 #cinema_key = cinema_key, #cinema_code = cinema_code FROM #cinema_list ORDER BY display_order
SET #count = #count + 1
END /*WHILE CINEMA KEY*/
and here's my code in updating the total_Qty and total_sales:
WHILE #count < #cinema_count
BEGIN
SET #count = #count+1.
SET #select = #select+'cinema'+CAST(#count AS VARCHAR)+'+'
END
SET #select = SUBSTRING(#select, 1, LEN(#select) - 1)
SET #buffer = 'UPDATE #temptable SET total_quantity = ' +cast(#qty as varchar) + ', ' + 'total_sales = '+#select
PRINT #buffer
EXEC( #buffer)
Help please :3 Thanks :)

Answer 1

I agree with #Dave Collins that this isn't database design at its greatest however if you want the simple answer, you need to add the existing value to the running total in your update.
Change this:
SET #buffer = 'UPDATE #temptable SET cinema'+CAST(#count AS VARCHAR)+' = '+CAST(ISNULL(sum(#amount),0) AS VARCHAR)+' WHERE [date] = '''+CAST (#tdate AS VARCHAR)+''''
To this:
SET #buffer = 'UPDATE #temptable SET cinema'+CAST(#count AS VARCHAR)+' = ISNULL(cinema,0) + '+CAST(ISNULL(sum(#amount),0) AS VARCHAR)+' WHERE [date] = '''+CAST (#tdate AS VARCHAR)+''''