J jack-wb Unregistered / Unconfirmed GUEST, unregistred user! 2002-10-08 #1 SQL语句 :问题比较俩个表将其中不同的记录选出来 SQL语句 如何写
Q QuickSilver Unregistered / Unconfirmed GUEST, unregistred user! 2002-10-08 #2 怎样最有效的比对两张表的内容,并将结果输出? http://www.delphibbs.com/delphibbs/dispq.asp?lid=1334106
S svw0506 Unregistered / Unconfirmed GUEST, unregistred user! 2002-10-08 #3 如果是Oracle可以用; select * from a minus select * from b