Newsgroups: fj.lang.misc
Path: galaxy.trc.rwcp.or.jp!coconuts.jaist!wnoc-tyo-news!news.iij.ad.jp!mewgate!mitsuru!mori
From: mori@isc.mew.co.jp (Shigeki Morimoto)
Subject: [Q]SQL
Message-ID: <MORI.94Nov30113800@hvh008.isc.mew.co.jp>
Lines: 37
Sender: news@isc.mew.co.jp (USENET News System)
Nntp-Posting-Host: hvh008.isc.mew.co.jp
Organization: Matsushita Electric Works, Ltd.
Date: Wed, 30 Nov 1994 02:38:00 GMT
Xref: galaxy.trc.rwcp.or.jp fj.lang.misc:1439
X-originally-archived-at: http://galaxy.rwcp.or.jp/text/cgi-bin/newsarticle2?ng=fj.lang.misc&nb=1439&hd=a
X-reformat-date: Mon, 18 Oct 2004 15:18:22 +0900
X-reformat-comment: Tabs were expanded into 4 column tabstops by the Galaxy's archiver. See http://katsu.watanabe.name/ancientfj/galaxy-format.html for more info.

$B?9K\!w%U%j!<%@%`(B($B2>>N(B)$B$G$9!#(B

$B%*%i%/%k$N#S#Q#LJ8$r:n@.$7$F$$$F:$$C$F$$$^$9!#(B

$B$H$j$"$($:$NNc$G@bL@$7$^$9!#(B

$BI=#A(B $B9`L\(B REGNO $B$K(B      0 $B!A(B 500,000 $B$,$O$$$C$F$$$k(B
$BI=#B(B $B9`L\(B REGNO $B$K(B      0 $B!A(B 150,000 $B$,$O$$$C$F$$$k(B
$BI=#C(B $B9`L\(B REGNO $B$K(B 90,000 $B!A(B 200,000 $B$,$O$$$C$F$$$k(B
$BI=#A(B,$B#B(B,$B#C(B $B$H$b(B REGNO $B$K(B unique index $B$rD%$C$F$$$^$9!#(B

$B$H$$$&>u67$G(B  $BI=#B(B or $BI=#C(B $B$N(B REGNO $B$r8!:w$7$?$$$N$G$9!#(B

$BM}A[$O(B
    select REGNO from B C
$B$NMQ$K(B $BI=#A$r%"%/%;%9$;$:(B $B$9$^$;$?$$$H;W$C$F$$$^$9$,(B $B$3$NJ}K!$,$o$+$j$^$;$s!#(B

$B$H$j$"$($:I=#A(B $B$r;HMQ$9$kJ}K!$G(B
    select count(distinct(A.REGNO)) from A, B, C
        where A.REGNO = B.REGNO  or A.REGNO = C.REGNO
$B$H$9$k$H(B $BHs>o$K;~4V$,$+$+$C$F$7$^$$$^$9!#(B

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$B$K;HMQ$7$h$&$H;W$C$F$$$^$9!#(B

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$B4D6-$O0J2<$NDL$j$G$9!#(B
    Sun SS10 SunOs4.1.3JLE-1.1.3
    oracle Version 7

$B$h$m$7$/$*4j$$$7$^$9!#(B

$B$^$?(B $B#S#Q#LJ8$K$D$$$F$N(B $B$h$$K\$,$"$l$P(B $B65$($F2<$5$$!#(B(_ _)
--
($BM-(B)$B%U%j!<%@%`(B($B2>>N(B)   $B$W$m$0$i$^$!(B         $B?9K\LP<y(B
mori@isc.mew.co.jp
