1. A database node of a database system, comprising: a daemon to communicate with a plurality of storage devices on a plurality of storage tiers of the database system; the daemon further configured to implement storage tiering control functionality in response to a command-based user-specified dynamic data selection of at least one database object subset and a tier imperative for at least first and second storage tiers comprising respective disjoint subsets of the plurality of storage tiers, wherein said command-based user-specified dynamic data selection comprises one or more verb phrases to dynamically generate said at least one database object subset from data in an active memory of said database node, wherein said daemon executes in said active memory; the daemon thereby being configured to dynamically control movement of said at least one dynamically generated database object subset between the at least first and second storage tiers in response to said command-based user-specified dynamic data selection and tier imperative; the daemon being implemented utilizing at least one processing device coupled to a memory.