What exactly does 1 unit of cost represent in SQL Query Analyzer execution plans? [ie: Subtree Cost: 41.2134] Obviously it is some form of measurement since a very simple "select @@version" is like ...

Automated query plan hypothesis testing. Built in an afternoon to stop staring at XML. It started as a single hypothesis check against a .sqlplan file. Every time a new incident pattern repeated ...

We have SQL Server 6.5 (soon to be 2000) and I was wondering if there is a query analyzer for Linux that would be able to execute queries on it.