How to create a SQL trigger to execute a stored procedure when a table is updated i need some help with creating a trigger to run a qf.stored_procedure when a qf.table is created. AT the moment, i have a job t run the stored procedure every 15 minutes but changing that is not an option.

The idea is for the trigger to run the stored procedure whenever the table is updated regardless of whether its a single row or all. As well am not sure whether to create it in triggers under the table or Database triggers?. i want the script to check if the trigger exist and if it doesn't then create it. 

table name: qf.customer_working_hours
columns: WHours_id,DayOFW

Stored Procedure: qf.ServiveRefreshCustomer_WH

Am new to SQL scripting and SQL triggers, any help will be appreciated
I am assuming you are trying to implement some basic replication using a trigger. As long as your process remains fairly simple, this should work OK.

However, I would advise you to read up on (i.e. google) why executing stored procedures from triggers is not a good idea, and also about SQL's built in transactional replication feature. Here is a practical guide to the 2nd topic: http://www.sql-server-performance.com/2010/transactional-replication-2008-r2/

Having said that, here is what I think should work:

USE [database_name]
IF EXISTS (SELECT 1 FROM sys.triggers WHERE name = N'trigger_name')
BEGIN
  THROW 51000, 'The trigger [trigger_name] already exists.', 1;
END
ELSE
  CREATE TRIGGER [trigger_name] ON qf.customer_working_hours
  AFTER INSERT, UPDATE, DELETE AS
  BEGIN
    SET NOCOUNT ON
    EXEC [procedure_database].qf.ServiveRefreshCustomer_WH
  END
BEGIN
END


EDIT: Updated trigger if exists check from Aaron's suggestion below.