create sql trigger after insert

i have two tables first table orders_details with columns orders_id ,date, admin_id, comments

second table orders_tracking with columns orders_id ,date, admin_id

in orders_details i have duplicates of rows

i want to create trigger that after row insert to orders_details the c trigger check if order_id and admin_id already exist the date column update in orders_tracking (take the date from orders_details) otherwise do insert to otherwise

example orders_details

id  order_id admin_id date(timestamp)   comments
1   1          2          111111111     test
2   1          2          111111511     test2
3   1          2          111111711     test3
4   1          3          111111161     test4

example orders_tracking

id order_id admin_id date(timestamp) 
1  1         2          111111111     
2  1         3          111111161     

insert now in orders_details have new insert

 order_id admin_id date(timestamp) comments
  5         2          111199111     test

update now in orders_details have new insert

 order_id admin_id date(timestamp) comments
  1         2          111199111     test

then orders_tracking

id order_id admin_id date(timestamp) 
1  1         2          111199111     
2  1         3          111111161 
3  5         2          111199111

Answer

step-1 : create a table orders_details

CREATE TABLE [dbo].[orders_details](
            [ID] [numeric](18, 0) NULL,
            [ORDER_ID] [numeric](18, 0) NULL,
            [ADMIN_ID] [numeric](18, 0) NULL,
            [DATE] [datetime] NULL,
            [COMMENTS] [varchar](50) NULL

) ON [PRIMARY]

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