MYSQL外键Errno（150）无法创建表

Question

我刚开始在大学里学习MYSQL，并且我有一个重要的任务要完成。 我不得不创建一个小型数据库，由于errno（150），我似乎无法添加带有外键的表。这就是我所拥有的。

create table Country
(CountryName varchar (50) not null,
Primary Key (CountryName));

create table InterestGroup
(IntrestgrpName varchar (30) not null,
Primary Key (IntrestgrpName));

create table Organisation
(OrgName varchar (50) not null,
OrgAddress varchar (30),
OrgTelNo.varchar (30),
Primary Key (OrgName));

create table Qualification
(QualName varchar (50) not null,
Primary Key (QualName));

create table Member
(MemberID varchar (15) not null,
MemberName varchar (30),
MemberAdd varchar (50) not null,
CountryName varchar (50) not null,
IntrestgrpName varchar (30) not null,
QualName varchar (50) not null,
OrgName varchar (50) not null,
Primary Key (MemberID),
Foreign Key (CountryName) References Country (CountryName),
Foreign Key (IntrestgrpName) References InterestGroup (InterestgrpName),
Foreign Key (QualName) References Qualification (Qualname),
Foreign Key (OrgName) References Organisation (OrgName));

我似乎无法获得要创建的Member表，它给出了此错误，错误1005（HY000）：无法创建表iicp.member（errno：150）在此先感谢您的帮助，我真的需要解决这个

Answer 1

这是工作查询

create table Country
(CountryName varchar (50) not null,
Primary Key (CountryName));

create table InterestGroup
(IntrestgrpName varchar (30) not null,
Primary Key (IntrestgrpName));

create table Organisation
(OrgName varchar (50) not null,
OrgAddress varchar (30),
OrgTelNo varchar (30),
Primary Key (OrgName));

create table Qualification
(QualName varchar (50) not null,
Primary Key (QualName));

create table Member
(MemberID varchar (15) not null ,
MemberName varchar (30),
MemberAdd varchar (50) not null,
CountryName varchar (50) not null,
IntrestgrpName varchar (30) not null,
QualName varchar (50) not null,
OrgName varchar (50) not null,
Primary Key (MemberID), 
Foreign Key (CountryName) References Country (CountryName),
Foreign Key (IntrestgrpName) References InterestGroup (IntrestgrpName),
Foreign Key (QualName) References Qualification (Qualname),
Foreign Key (OrgName) References Organisation (OrgName));

在此处演示SQLFIDDLE

Answer 2

您的SQL是正确的。 它通过以下更改为我工作：

OrgTelNo.varchar (30) to OrgTelNo varchar (30)

Answer 3

SHOW ENGINE INNODB STATUS;


...

------------------------
LATEST FOREIGN KEY ERROR
------------------------
130211 15:09:26 Error in foreign key constraint of table test/member:
Foreign Key (IntrestgrpName) References InterestGroup (InterestgrpName),
Foreign Key (QualName) References Qualification (Qualname),
Foreign Key (OrgName) References Organisation (OrgName)):
Cannot resolve column name close to:
),
Foreign Key (QualName) References Qualification (Qualname),
Foreign Key (OrgName) References Organisation (OrgName))

...

您在表InterestGroup中引用了名为InterestgrpName的列，但该列的实际名称是IntrestgrpName

Foreign Key (IntrestgrpName) References InterestGroup (InterestgrpName),

You have type error here -----------------------------------^

Answer 4

OrgTelNo.varchar (30),

代替这个，你应该写

OrgTelNo varchar (30),

这也是最后一个表成员创建中的一个拼写错误。

FOREIGN KEY ( IntrestgrpName ) REFERENCES InterestGroup ( IntrestgrpName)

尝试一下。