Re: [SQLObject] Auto-generating Joins

[Christopher S. <csi...@gm...>]

On Thursday 07 February 2008 11:58:34 Oleg Broytmann wrote:
>    What do you mean by "changing dynamically"?

I mean "dynamical system" where the state of the system is a function of time.  
I need a function which accepts a time variable as an input, and returns a 
state.

Consider exchange-traded securities (e.g.  stocks).  An important attribute of 
a stock is its price.  Stock trading prices are a time series of discrete 
points.  Yahoo Finance, among others, persists series of prices and allows 
users to look them up by time.  That's the kind of thing I'm talking about: