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Add Transaction for Order Cancellation
Add Transaction for Order Cancellation
Order Table:
OrderDetails Table:
Query Description:
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This transaction deletes an order and its related details from the database.
-
If the order exists, both the order and its items are deleted.
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If the order does not exist, the transaction is rolled back.
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This ensures data integrity and prevents orphan records.
SQL Query:
USE IT;
BEGIN TRANSACTION;
DECLARE @OrderID INT = 1001;
-- Check if the order exists
IF EXISTS (SELECT 1 FROM Orders WHERE OrderID = @OrderID)
BEGIN
-- First delete from OrderDetails (child table)
DELETE FROM OrderDetails WHERE OrderID = @OrderID;
-- Then delete from Orders (parent table)
DELETE FROM Orders WHERE OrderID = @OrderID;
COMMIT TRANSACTION;
PRINT 'Order and related details cancelled successfully.';
END
ELSE
BEGIN
ROLLBACK TRANSACTION;
PRINT 'Cancellation failed: Order not found.';
END;
Output:
