Help On Oracle RDB Migration To SQL Server.

Hi,
We need help on following things,

1. Inputs on creating comments on the columns & Tables of a SQL
Database & generating the sql script of that.

2. Is it possible to call a .exe file in SQL server like following
code in ORACLE

create procedure CERT_VERIFY_PROCEDURE ( in :X Y by value )
language SQL;
external
name "CERT_VERIFY"
location 'HOST_IMG:TEST_CALCS.EXE'
with ALL logical_name translation
language C
GENERAL parameter style

3. We are using Rules for restricting data(now), We need inputs
whether to use Check constraints or Rules.

Thanks & Regards,
Chandra Mohan