INSERT and UPDATE after one row inserted MS SQL - sql-server

Question

I don't know if I'm thinking correct, so I'm open for suggestions.
I'm using MS SQL SERVER 2008 R2.
Here is the 'story'
Everytime someone insert a row into tblDelivered there is a trigger that insert in tblConditionDel five values(1,1,1,1,1). This is a table with an auto ID increment. And for that inserted row must fieldname ConditionID be updated with the ID from tblConditionDel.
I think there is something wrong with my where statement
If I delete the where statement the ID is update for the entire table, but it must be for the one inserted row.
My code:
ALTER TRIGGER [dbo].[trgCond2] ON [dbo].[tblDelivered]
AFTER INSERT
AS
insert into tblConditionDel(Con1,Con2,Con3,Con4, Con5)
values(1,1,1,1,1);
update tblDelivered set ConditionID = (select max(ConditionID) from tblConditionDel)
where (select 1 from inserted) = tblDelivered.ConditionID
Thx in advance

Answer 1

Your solution does not work if more than one row is inserted.
Do like this
CREATE TABLE tblDelivered (
DeliveredID int NOT NULL
,ConditionID int
);
CREATE TABLE tblConditionDel (
ConditionID int IDENTITY(1,1)
,Con1 int NOT NULL
,Con2 int NOT NULL
,Con3 int NOT NULL
,Con4 int NOT NULL
,Con5 int NOT NULL
);
CREATE TRIGGER [dbo].[trgCond2] ON [dbo].[tblDelivered]
AFTER INSERT
AS
SET NOCOUNT ON;
DECLARE #ConditionIDs AS table ( -- stores inserted conditionsIDs
DeliveredID int NOT NULL
,ConditionID int NOT NULL
);
MERGE INTO tblConditionDel -- INSERT does not support OUTPUT INTO for multiple rows
USING inserted AS triggerinserted
ON 1 = 0
WHEN NOT MATCHED THEN
INSERT (Con1, Con2, Con3, Con4, Con5)
VALUES (1,1,1,1,1)
OUTPUT triggerinserted.DeliveredID
,inserted.ConditionID
INTO #ConditionIDs;
UPDATE tblDelivered
SET ConditionID = ConditionIDs.ConditionID
FROM tblDelivered
INNER JOIN #ConditionIDs AS ConditionIDs
ON ConditionIDs.DeliveredID = tblDelivered.DeliveredID
-- Test code
INSERT INTO tblDelivered (DeliveredID)
VALUES (4),(5),(6);
SELECT * FROM tblConditionDel
SELECT * FROM tblDelivered

Answer 2

You would want to do something like this:
ALTER TRIGGER [dbo].[trgCond2] ON [dbo].[tblDelivered]
AFTER INSERT
AS
declare #new_id int, #delivered_id int
set #delivered_id = (select ConditionID from inserted) -- captures id from inserted table
insert into tblConditionDel(Con1,Con2,Con3,Con4, Con5)
values(1,1,1,1,1);
set #new_id = scope_identity() -- captures new id from tblCondition into a variable
update tblDelivered set ConditionID = #new_id -- set new tblcondition id
where ConditionID = #delivered_id -- for the record that matches the inserted one