SQL Trigger-To check the data at Notes Field

I am going to write a Trigger to validate the column field in the table name 'LenderAddressAll' and the column name is 'Notes'.My trigger checks the data entered into that column and if it valid that's ok otherwise it'll pop up 'error'.The data format should be 000 xxxxxx.First three numbers should be 0's and then empty space and after that it should be any six digits(Total varchar(10)).

Create trigger tri

on

LenderAddressesALL

after

insert

AS
select lender.Notes from LenderAddressesALL lender join inserted i on i.Notes = lender.Notes

where i.Notes is NOT null
declare @temp varchar(10)

select @temp = Notes from inserted

if(len(@temp) = 10 and substring(@temp,1, 4) = '000 '

and cast(substring(@temp, 5, 10) as int) > 0

and cast(substring(@temp, 5, 10) as int) <>

return

else

begin print 'error!!!!'

RAISERROR ('Error!!', 16, 1)

rollback transaction

end
GO

Happy Programming!!