Vertabelo is great but it's missing Computed Columns feature, at least in SQL Server projects.

So Calculated Columns are created like this (Inventory), and I really think that implementing this feature for you is not a big trouble.

CREATE TABLE dbo.Products
(  
    ProductID int IDENTITY (1,1) NOT NULL  
  , QtyAvailable smallint  
  , UnitPrice money  
  , InventoryValue AS QtyAvailable * UnitPrice  
);

Full documentation on https://msdn.microsoft.com/en-us/library/ms188300.aspx

Once I generate SQL and create my database, is it possible to generate "modification" sql, which might involve saving old data and re-inserting in new tables?

I want to chane the user name and emil ID of sachin@rawalinfocom.com to cto@rawalinfocom.com

I just want to create a separate iteration for a phase of my database diagram. Is there a way I can literally just copy it without exporting sql and reverse engineering the import?

I want to create a Certificate entity, and want the SQL to be coded as an associative entity. Is there an existing tool for this?

can u tell : ports required ? firewall config ? ....

how do i add the mandatory symbols in vertabello? i'm using crow's foot notation

So far, I'm pretty impressed with the features that this modeling tool offers. There are a few minimum things that I think are missing which could make it even better. When doing an import from MSSQL, I'd like to have it save the stored procedures / triggers / functions / etc at the very least in the section where it will run after the generated model. If you wanted to exceed all my expectations, these could also be stored as objects in the model, and decorated so that you could see dependencies. Looking at the XML, you could add entities for Procedures, Triggers, Functions and store them accordingly.