SQL Server Hosting» To Add a foreign key to a column in an existing table, use ALTER TABLE ADD CONSTRAINT [cc lang=”sql”] ALTER TABLE dbo.President_Lookup ADD CONSTRAINT fk_PresidentID FOREIGN KEY (PresidentID) REFERENCES dbo.Presidents (PresidentID) ...
1.语法:ALTER TABLE 表名 ADD CONSTRAINT 主键名 PRIMARY KEY 表名(主键字段); 3.添加外键 1.语法:ALTER TABLE 表名 ADD CONNSTRAINT 外键名 FOREIGN KEY(外键字段) REFERENCES 关联表名(关联字段); 4.插入单(多)条数据记录(和SQL Server相同,但是不能用select多列添加数据) 1.INSERT INTO 表名[(字段名...
FOREIGN KEY ( [DepartmentID] ) REFERENCES [dbo].[Department] ( [DepartmentID] ) But since the DepartmentID in the [dbo].[Department] is not designated as a PRIMARY KEY on that table, the following error is encountered: Server: Msg 1776, Level 16, State 1, Line 1 There are no primar...
add constraint 你自己定义的主健名 primary key (列名) /*增加外键*/ 设置成外键的列在主表和从表中的数据类型要一样,从表中的数据要是在主表中的 alter table 从表名 add constraint 你自己定义的外健名 foreign key(要设置的列) references 主表名 (要设置的列) /*增加某一行数据*/ insert into (...
SAP DBTech JDBC: [257] (at 50): sql syntax error: incorrect syntax near "KEY": line 2 col 16 (at pos 50) Is it possible to alter the table adding foreign key in SQL92 syntax or do i need to establish the relationship while framing CREATE TABLE stmt? Regards, ANKnow...
我想要往 job 表中 insert 一条数据,报错如题。 原因:要插入 job 表的数据中外键列的值有问题,userId 字段的值在 user 表中找不到。 解决: 确保 job 表中要引用的外键值在 user 表中有对应数据就可以了。 “ you're adding a foreign key, you need to make sure that the data in the child tabl...
ADD Constraint `f_key_userdata` Foreign Key `uname` References `userdata`.(`uname`); I get error: #1064 - You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'References `userdata`.(`uname`)' at line...
How To Auto Increment Alphanumeric Primary Key In sql server 2008 How to auto logout a user from ASP.Net site after s/he is idle for more than X minutes ? How to autoclick on the URL without user's interactivity how to automatically close browser window how to avoid editing data by ...
在表key_list中新增外键server_name_id_ibfk: ALTER TABLEkey_listADD CONSTRAINTserver_name_id_ibfkFOREIGN KEY (server_name) REFERENCESfor_list(for_name); 执行报错。错误代码: 1215 Cannot add foreign key constraint 原因: 在新增外键时,关联表(for_list)中的相关字段(for_name)必须为index ...
Re: Alter table add foreign key causes can't create table errorPosted by: Andrew Cutforth Date: December 23, 2013 06:34AM Thanks for your help. It seems you always have to specify the destination table primary key field name. I was used to SQL Server where you can leave this out....