Let's assume that I have the following code:
-- create the two tables
CREATE TABLE TABLE_2 (ID INT NOT NULL IDENTITY(1,1), ProdName VARCHAR(50))
CREATE TABLE TABLE_1 (ProdName VARCHAR(50), Bought INT)
GO
-- create trigger on "TABLE_2" to update "TABLE_1"
CREATE TRIGGER T2Insert
ON TABLE_2
AFTER INSERT
AS
UPDATE T1
SET Bought = Bought + 1
FROM TABLE_1 T1
INNER JOIN Inserted i ON T1.ProdName = i.ProdName
WHERE T1.Bought < 100
GO
-- initialize TABLE_1 with some seed data
INSERT INTO dbo.TABLE_1 (ProdName, Bought)
VALUES ( 'Prod1', 0), ('Prod2', 20), ('Prod3', 40), ('Prod4', 40), ('Prod100', 100)
-- insert new values into TABLE_2
INSERT INTO dbo.TABLE_2 (ProdName)
VALUES ('Prod1'), ('Prod100'), ('Prod2'), ('Prod4')
-- get data to check
SELECT * FROM dbo.TABLE_1
The trigger works fine. However, If I insert something like this on TABLE_2 :
INSERT INTO dbo.TABLE_2 (ProdName)
VALUES ('Prod1'), ('Prod1')
It only gets updated once. basically the
SET Bought = Bought + 1 updates once instead of twice/or whatever the number of values I try to insert.
If you can solve this issue, let me know In the thread and how much $ you are looking for