By the way, for example on how NOT to do SQL & web programming see the white pages service at fwd.pulver.net or the search in Skype. Both of these have well under a million records usually and it takes minutes to hours to get answers. At least Skype starts displaying as soon as there is data. The fwd server will grind quietly with only one search key. Another example (better) is how htdig (web search engine) works. It uses dbm as backend. htdig is not the fastest engine in the world but one can have an answer on a compound query in a few seconds on a single user machine. Of course it takes half a day to build the indexes.
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