SQL trigger with parameter - node.js

Question

I have a nodejs app with SQL Server. I want to be able to update a table for a "specific org" based on an insert and delete action. Let's say I have 2 tables as follows:
Project: projId, orgId, projName
Tasks: taskId, projId, taskName
Users: userId, orgId, userName
OrganizationStats: numberOfProjects, numberOfUsers, numberOfTasks orgId
So let's say I add a new project for an organization where orgId = 1. My insert statement from Nodejs would be:
insert into project (projId, orgId, projName)
values (${'projId'}, ${'orgId'}, 'New Project');
I want to write a trigger in SQL Server that adds 1 to the numberOfProjects column with orgId that's passed in.
create trigger updateProjectAfterInsert
on project
after insert
as
begin
update OrganizationStats
set numprojects = numberOfProjects + 1
where orgId = 'THE_INSERTED_ORGID_VALUE';
end;
My problem is I don't know how to pass the ${'orgId'} to the trigger.

Answer 1

I'm going to expand on my comment here:
Personally, I recommend against storing values which can be calculated by an aggregate. If you need such information easily accessible, you're better off making a VIEW with the value in there, in my opinion.
What I mean by this is that NumProjects has "no right" being in the table OrganizationStats, instead it should be calculated at the time the information is needed. You can't use an aggregate function in a computed column's definition without a scalar function, and those can be quite slow. Instead I recommend creating a VIEW (or if you prefer table value function) to give you the information from the table:
CREATE VIEW dbo.vw_OrganisationStats AS
SELECT {Columns from OrganizationStats},
P.Projects AS NumProjects
FROM dbo.OrganizationStats OS
CROSS APPLY (SELECT COUNT(*) AS Projects
FROM dbo.Projects P
WHERE P.OrgID = OS.OrgID) P;
I use a CROSS APPLY with a subquery, as then you don't need a huge GROUP BY at the end.

Answer 2

I think what you want this something like this:
CREATE TRIGGER updateProjectAfterInsert
ON Project
AFTER INSERT
AS
BEGIN
UPDATE OrganizationStats
SET NumProjects = NumProjects + 1
WHERE OrgId IN (SELECT OrgId FROM inserted);
END;
Also note, Triggers must always assume multiple rows. It's possible to insert multiple rows, update multiple rows, and delete multiple rows. The "inserted" and "deleted" collections contain the data needed ("inserted" contains the rows being inserted, "deleted" contains the rows being deleted, and on an update "inserted" contains the values after the update, and "deleted" contains the values before the update).