Exclude specific rows from table in Stored Procedure - sql

Question

I have a table named Blacklist and table named Order.
Both have CustomerId column.
Stored Procedure ExecOrder manipulates Order table.
My goal is to exclude Orders that have Blacklisted CustomerId (meaning : Order's CustomerId is in Blacklist table).
I edited ExecOrder SP like this:
DECLARE #Temp TABLE
(
CustomerId UNIQUEIDENTIFIER
);
INSERT INTO #Temp
SELECT RightSide
FROM Blacklist
WHERE LeftSide = #CustomerId;
BEGIN
DECLARE db_cursor CURSOR
FOR SELECT OrderId
FROM dbo.[Order] ord
LEFT OUTER JOIN #Temp t ON t.CustomerId <> ord.CustomerId AND ord.CustomerId <> #CustomerId
WHERE AssetId = #BaseAsset
AND CurrencyId = #QuoteAsset
AND OrderTypeId <> #OrderType
AND [QuotePrice] <= #QuotePrice
AND OrderStatusId = 10
AND Amount > ISNULL(AmountFilled, 0)
AND OrderId < #OrderId
AND OrderBookId = #OrderBookId
AND DeliveryStart = #DeliveryPeriodStart
AND DeliveryEnd = #DeliveryPeriodEnd
AND #MinAmount <= Amount - ISNULL(AmountFilled, 0)
ORDER BY OrderDate;
END;
#Temp table returns correct list of CustomerIds.
Problem is that blacklisted orders are not excluded.

Answer 1

Your #Temp table is holding blacklisted customers.
-- contains blacklisted customer
INSERT INTO #Temp
SELECT RightSide
FROM Blacklist
WHERE LeftSide = #CustomerId;
Now, you need to select orders of customers not existing in #Temp table.
-- You need to select orders, where customerId not exists in #Temp table
SELECT OrderId
FROM dbo.[Order] ord
WHERE NOT EXISTS(SELECT 1 from #Temp WHERE customerId = ord.CustomerId) ...

Answer 2

You should connect with blacklist and take only where connected blacklist not existst:
LEFT OUTER JOIN #Temp t ON t.CustomerId <> ord.CustomerId AND ord.CustomerId <> #CustomerId
Change to:
LEFT OUTER JOIN #Temp t ON t.CustomerId = ord.CustomerId OR ord.CustomerId = #CustomerId
Next you should check if it is empty:
WHERE ... AND t.CustomerId IS NULL