/***CREATE TABLE
SET ANSI_NULLS ON
GO

SET QUOTED_IDENTIFIER ON
GO

SET ANSI_PADDING ON
GO

CREATE TABLE [dbo].[Users](
	[uid] [int] IDENTITY(1,1) NOT NULL,
	[fname] [varchar](50) NOT NULL,
	[lname] [varchar](50) NOT NULL,
	[title] [varchar](50) NULL,
	[manager] [varchar](2) NULL,
	[create_date] [datetime] NOT NULL,
	[modify_date] [datetime] NOT NULL
) ON [PRIMARY]

GO

SET ANSI_PADDING OFF
GO

EXEC sys.sp_addextendedproperty @name=N'MS_Description', @value=N'User a manager or not ' , @level0type=N'SCHEMA',@level0name=N'dbo', @level1type=N'TABLE',@level1name=N'Users', @level2type=N'COLUMN',@level2name=N'manager'
GO

ALTER TABLE [dbo].[Users] ADD  CONSTRAINT [DF_Users_manager]  DEFAULT ((0)) FOR [manager]
GO

ALTER TABLE [dbo].[Users] ADD  CONSTRAINT [DF_Users_create_date]  DEFAULT (getdate()) FOR [create_date]
GO

ALTER TABLE [dbo].[Users] ADD  CONSTRAINT [DF_Users_modify_date]  DEFAULT (getdate()) FOR [modify_date]
GO


***/


 
/****
CREATE TRIGGER usermod
on dbo.Users
After UPDATE 
AS BEGIN
   Update dbo.Users
   set modify_date = getdate()
   from INSERTED i
   Where i.uid = dbo.Users.uid
END
***/

/***
TEST INSERT
insert into dbo.Users (fname,lname,title,manager) values ('bob','smith','Director','1')
insert into dbo.Users (fname,lname,title,manager) values ('joe','jones','Manager','1')
***/
/*** TEST UPDATE
update dbo.Users set fname='joan' where uid = 2
***/

/****** Script for SelectTopNRows command from SSMS  
SELECT TOP 10[uid]
      ,[fname]
      ,[lname]
      ,[title]
      ,[manager]
      ,[create_date]
      ,[modify_date]
  FROM [dbo].[Users]
******/

This will create a table, create an update trigger to add current datetime to modify_date field, do 2 inserts, 1 update and display the results.

Update trigger for datetime modified field

update

SQL