SELECT COUNT(*) FROM USER_TAB_COLUMNS WHERE TABLE_NAME=UPPER(''''legalentity'''') MYSQL中的外键: /*==============================================================*/ /* DBMS name: MySQL 4.0 */ /* Created on: 2005-8-9 16:38:37 */ /*==============================================================*/ drop table if exists Article;
drop table if exists Board; drop table if exists User; /*==============================================================*/ /* Table: Article */ /*==============================================================*/ create table Article ( id int not null primary key, parent_id int, index(parent_id), foreign key (parent_id) references Article (id) , board_id int not null, index(board_id), foreign key (board_id) references Board (id) , article_type int not null, title varchar(255) not null, body text, create_by int not null, index(create_by), foreign key (create_by) references User (id) , create_time datetime not null, hits int not null, bytes int, last_update_by int not null, index(last_update_by), foreign key (last_update_by) references User (id), last_update_time datetime not null, ) type = InnoDB; /*==============================================================*/ /* Table: Board */ /*==============================================================*/ create table Board ( id int not null primary key, create_by int not null, index(create_by), foreign key (create_by) references User (id), parent_id int, index(parent_id), foreign key (parent_id) references Board (id), name varchar(50) not null, remark varchar(255), create_time datetime not null, ) type = InnoDB; /*==============================================================*/ /* Table: User * [1] [2] 下一页 [办公软件]在sybase中插入图片、PDF、文本文件 [办公软件]安装Sybase ASE [办公软件]linux指令大全(完整篇) [办公软件]Linux新手入门常用命令大全 [办公软件]在RedHat Linux 9里安装gaim0.80 [办公软件]浅谈Linux 下Java 1.5 汉字方块问题解决方法 [办公软件]Linux程序员必读:中文化与GB18030标准 [办公软件]linux指令大全 [办公软件]制作Linux启动盘的四种方法 [办公软件]Linux文件系统的反删除方法
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