I have a general question on what people use to fix or clean records that when ACCOUNT, FIRST_NAME, LAST_NAME are dirty. I cannot use the website's import tool to update records since there were several dirty imports undertaken without a test plan.

I have a lead source that is keyed on custom fields (staffid for CONTACT, bigdough_instid for ACCOUNT) and want to be able to periodically update records based on those keys through the use of SQL.

Is there a way to manipulate my company's salesforce.com data using something akin to SQLPlus or TOAD without writing an application?