Thread View: cn.bbs.comp.database
1 messages
1 total messages
Started by �F��ħ��ɳ
Tue, 17 Aug 2010 09:45
Re: ����һ���ܻ������
Author: �F��ħ��ɳ
Date: Tue, 17 Aug 2010 09:45
Date: Tue, 17 Aug 2010 09:45
22 lines
1939 bytes
1939 bytes
CONSTRAINT MyUniqueKey UNIQUE (Name) ��http://www.java2s.com/Code/SQL/Select-Clause/SettingaUniqueConstraint.htm �� �� dashun (��˳) �Ĵ������ᵽ: �� : ���붨������һ��Լ�� : һ��������2���ֶ�A��B��������B��ֵ��ͬ�ļ�¼�У�A��ֵ�������ظ� : �ٸ����ӣ�����������ݿ����������� : id A B : -------------------- : 1 'aaa' 1 : 2 'bbb' 1 : ��ʱ����Ҫ���루3, 'aaa', 2)�ǺϷ��ģ�����Ҫ���루3, 'aaa', 1)�ǷǷ��� : �������Լ������ݿ���Ӧ����ô���ð������õ���mysql : л���� -- ��ͨ���\ħ����Ů����ɫ�ޥ����`���ѩ`�� ����ޥ����`���ѩ`���� ħ�h���ե����ʥ륹�ѩ`���� ħ��ɳ ��������˽? �������ʡ�������Ρ���Ů������ [m[1;31m�� ��Դ:����ˮ˼Դ bbs.sjtu.edu.cn��[FROM: 207.46.55.31][m
Thread Navigation
This is a paginated view of messages in the thread with full content displayed inline.
Messages are displayed in chronological order, with the original post highlighted in green.
Use pagination controls to navigate through all messages in large threads.
Back to All Threads