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1，求一段 php关于字段调用的语句

select * from jiage1, jiage2 where jiage1.baojia = jiage2.yuanjia

求一段 php关于字段调用的语句

2，店铺装潢应该找谁

其实装修公司关键要看资质，看承接过工程质量状况，再看看人家刚刚做好的工程质量如何，做个比较，做到心中有数，哪些装修工程难点。必须签订装修合同，明确合同责任与义务，材料采购，设计是否符合使用安全、合理，装修是否敬业，费用是否合理，人员是否科学安排，是否有施工方案，施工进度，材料供应要相关进货凭证及清单表，施工过程中，最好要监理性质人员在场，做隐蔽工程的监督。在最后竣工验收必须对水压进行测试，用气放面请相关人员进行验收，布置是否按施工设计图进行施工，如有需双方协商解决。以上能够做好的才能安心把自个的家放心交给家装公司，就目前而言，我们小区都是在一号家居装的，都好几年是这样了，也没听说过什么问题，应该还不错吧。

店铺装潢应该找谁

3，oracle怎么创建外键

create TABLE zhao( id number primary key, mingcheng nvarchar2(50), neirong nvarchar2(50), jiezhiriqi date, zhuangtai nvarchar2(50));create TABLE tou( id number primary key, zhao_id number, toubiaoqiye nvarchar2(50), biaoshuneirong nvarchar2(50), toubiaoriqi date, baojia number, zhuangtai nvarchar2(50), foreign KEY(zhao_id) REFERENCES zhao(id));foreign key (zhao_id) references to zhao(id)多了个to
oracle创建外键约束有两种方法：1、创建表时直接创建外键约束create table books( bookid number(10) not null primary key, bookname varchar2(20) not null, price number(10,2), categoryid number(10) not null references category(id) --外键约束);2、先创建表，表创建成功后，单独添加外键约束create table books( bookid number(10) not null primary key, bookname varchar2(20) not null, price number(10,2), categoryid number(10) not null);alter table books add constraint fk_book_categoryid foreign key(categoryid ) references category(id);

oracle怎么创建外键

4，oracle创建外键

create TABLE zhao( id number primary key, mingcheng nvarchar2(50), neirong nvarchar2(50), jiezhiriqi date, zhuangtai nvarchar2(50));create TABLE tou( id number primary key, zhao_id number, toubiaoqiye nvarchar2(50), biaoshuneirong nvarchar2(50), toubiaoriqi date, baojia number, zhuangtai nvarchar2(50), foreign KEY(zhao_id) REFERENCES zhao(id));foreign key (zhao_id) references to zhao(id)多了个to
oracle创建外键约束有两种方法：1、创建表时直接创建外键约束create table books( bookid number(10) not null primary key, bookname varchar2(20) not null, price number(10,2), categoryid number(10) not null references category(id) --外键约束);2、先创建表，表创建成功后，单独添加外键约束create table books( bookid number(10) not null primary key, bookname varchar2(20) not null, price number(10,2), categoryid number(10) not null);alter table books add constraint fk_book_categoryid foreign key(categoryid ) references category(id);
create table zhao(id number primary key,mingcheng nvarchar2(50),neirong nvarchar2(50),jiezhiriqi date,zhuangtai nvarchar2(50))create table tou(id number primary key,zhao_id number,toubiaoqiye nvarchar2(50),biaoshuneirong nvarchar2(50),toubiaoriqi date,baojia number,zhuangtai nvarchar2(50),foreign key (zhao_id) references zhao(id))references 不是references to
你在建立外键的时候不就已经把它和A表的主键关联起来了么。。CONSTRAINT fk_name FOREIGN KEY (A_ID) REFERENCES A(ID);

5，oracle 创建外键

--你随便改个约束名就可以了 --有什么疑问可以随时问我 希望采纳alter table T_NUM1 CONSTRAINT FOREIGN KEY NUM1 REFERENCES T_NUM2 (NUM2)
oracle创建外键约束有两种方法：1、创建表时直接创建外键约束create table books( bookid number(10) not null primary key, bookName varchar2(20) not null, price number(10,2), categoryId number(10) not null references Category(id) --外键约束);2、先创建表，表创建成功后，单独添加外键约束create table books( bookid number(10) not null primary key, bookName varchar2(20) not null, price number(10,2), categoryId number(10) not null);ALTER TABLE books ADD CONSTRAINT FK_Book_categoryid FOREIGN KEY(categoryId ) REFERENCES Category(id);
create table zhao( id number primary key, mingcheng nvarchar2(50), neirong nvarchar2(50), jiezhiriqi date, zhuangtai nvarchar2(50));create table tou( id number primary key, zhao_id number, toubiaoqiye nvarchar2(50), biaoshuneirong nvarchar2(50), toubiaoriqi date, baojia number, zhuangtai nvarchar2(50), foreign key(zhao_id) references zhao(id));foreign key (zhao_id) references to zhao(id)多了个to
create table t_num1 ( back_id int primary key );create table t_num2 ( back_id int ,CONSTRAINT fk_id FOREIGN KEY(back_id) REFERENCES t_num1(back_id) );SQL> create table t_num1 ( back_id int primary key );表已创建。SQL>SQL> create table t_num2 ( back_id int ,CONSTRAINT fk_id FOREIGN KEY(back_id) REFERENCES t_num1(back_id) );表已创建。

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