General commands control opening and closing the data- base.
For example, a non-cursor SQL select statement will return results in a 2 dimensional Tcl array. Cursor commands use a user named SQL cursor to access the database. Cursors allow a user to efficiently step through a the results of a select statement one row at a time. For example, a cursor SQL fetch statement will return results in a 1 dimensional Tcl array. SQLdbName Return the name of the currently open database.