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Date: 2001-11-09 07:37 am (UTC);)
?? ???????????? ????? ???? ???????, ??? SEQUENTIAL SCAN ? 99% ????????? ??????? ??????????? ????? ??????? ??????? ?? ????????? ??????? ?? ????????? ???????.. (??????? ??????, ?? ???? ? ????) ??? ?? ?? subselects - ??? ??? ?????? ????????? ?????..
???, ????????, ???? ????????? ???????????? ??????? ????? ??????, ?? ?? ?????? ????? ?????????? ??????? ?? ??????? ????? ??? ??? ?? ? ????????.. ??????? ???????, ???? ? ??????? ??? ?????? ?? PRIMARY KEY, ?? ??? ?????? ???? ???????? ?? ????????????? ??????.. ????, ??????, ? ??????? ?????????? 3 ???? ? ??????? ???? ?????? ?? ??????, ?? ?? ???? ?? ??? ???????..
? ?????, ??? ???? ??????, ???? ????????? ??????????????.. ? ? ?????? ??????? ???? ? Informix'? ? ?? ????.. ?? ??????? ???? ? 9.2x