SalesForce and updating data

I have successfully connected to our Salesforce sandbox and have executed a query. I am now trying to update a sample number of rows in a custom field.

The results of the query indicate successful, however the data on sandbox does not reflect the update statement. I also tried issuing a commit statement….to no avail.

Two questions as it relates to Salesforce and Toad DataPoint professional version:

  1. Is the update possible from Toad SQL statement (I have sys admin rites on SFDC)

  2. How can I query system variable fields such as Create Date or Last Modified by/Date