Mysql 我不断收到一个SQL语法错误,我不知道';我不知道为什么
这是我的密码:Mysql 我不断收到一个SQL语法错误,我不知道';我不知道为什么,mysql,sql,foreign-keys,syntax-error,primary-key,Mysql,Sql,Foreign Keys,Syntax Error,Primary Key,这是我的密码: CREATE TABLE Doctor ( ssn CHAR(11) PRIMARY KEY, name CHAR(30), specialty CHAR(30), yearsOfExperience INTEGER ); CREATE TABLE Pharmacy ( pharm_id CHAR(11) PRIMARY KEY, name CHAR(30), address CHAR(30), phone INT
CREATE TABLE Doctor (
ssn CHAR(11) PRIMARY KEY,
name CHAR(30),
specialty CHAR(30),
yearsOfExperience INTEGER
);
CREATE TABLE Pharmacy (
pharm_id CHAR(11) PRIMARY KEY,
name CHAR(30),
address CHAR(30),
phone INTEGER
);
CREATE TABLE Pharm_co (
name CHAR(30) PRIMARY KEY,
phone INTEGER
);
CREATE TABLE Pri_Phy_Patient (
ssn CHAR(11) PRIMARY KEY,
name CHAR(20),
age INTEGER,
address CHAR(20),
phy_ssn CHAR(11),
FOREIGN KEY (phy_ssn) REFERENCES Doctor(ssn)
);
CREATE TABLE Make_Drug (
trade_name CHAR(20) PRIMARY KEY,
pharm_co_name CHAR(30) PRIMARY KEY,
formula VARCHAR(100)
FOREIGN KEY (pharm_co_name) REFERENCES Pharm_co(name)
);
CREATE TABLE Prescription (
pre_id NUMBER(10) PRIMARY KEY,
status CHAR(20), -- canceled/ready/pending/completed
drop_off_time TIMESTAMP,
pick_up_time TIMESTAMP,
ssn CHAR(11), -- patient’s ssn
phy_ssn CHAR(11),
pre_date CHAR(11),
quantity INTEGER,
trade_name CHAR(20),
name CHAR(11),
pharm_co_name CHAR(30),
FOREIGN KEY (ssn) REFERENCES Pri_Phy_Patient(ssn),
FOREIGN KEY (phy_ssn) REFERENCES Doctor(ssn),
FOREIGN KEY (trade_name) REFERENCES Make_Drug(trade_name),
FOREIGN KEY (pharm_co_name) REFERENCES Make_Drug(pharm_co_name)
);
CREATE TABLE Contract (
pharm_id CHAR(11) PRIMARY KEY,
start_date CHAR(11),
end_date CHAR(11),
text VARCHAR(4000),
supervisor CHAR(20),
pharm_co_name CHAR(30) PRIMARY KEY,,
FOREIGN KEY (pharm_id) REFERENCES Pharmacy(pharm_id),
FOREIGN KEY (pharm_co_name) REFERENCES Pharm_co(name)
);
每当我尝试构建架构时:
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 'FOREIGN KEY (pharm_co_name) REFERENCES Pharm_co(name))' at line 5
我不知道为什么它总是给我语法错误。我很确定这是外键的正确语法。我应该如何解决该问题?我试着换东西,但似乎没法用。你漏掉了一个逗号。使其正确为-
CREATE TABLE Make_Drug (
trade_name CHAR(20) PRIMARY KEY,
pharm_co_name CHAR(30) PRIMARY KEY,
formula VARCHAR(100), <-- add this comma
FOREIGN KEY (pharm_co_name) REFERENCES Pharm_co(name)
);
创建表格制作药物(
商品名称字符(20)主键,
pharm_co_名称字符(30)主键,
公式VARCHAR(100),在本声明中:
CREATE TABLE Make_Drug (
trade_name CHAR(20) PRIMARY KEY,
pharm_co_name CHAR(30) PRIMARY KEY,
formula VARCHAR(100) <-- missing comma
FOREIGN KEY (pharm_co_name) REFERENCES Pharm_co(name)
);
创建表格制作药物(
商品名称字符(20)主键,
pharm_co_名称字符(30)主键,
formula VARCHAR(100)不能将两列声明为主键,内联。请尝试以下操作:
CREATE TABLE Make_Drug (
trade_name CHAR(20),
pharm_co_name CHAR(30),
formula VARCHAR(100),
PRIMARY KEY (trade_name, pharm_co_name),
FOREIGN KEY (pharm_co_name) REFERENCES Pharm_co(name)
);
这还可以修复缺少的逗号。检查逗号(,
)。在外键(pharm co\u name)之前缺少逗号,请添加与dbmsun相关的标记,但是:char(..)
几乎总是一个错误的选择。pharm\u co\u name char(30)主键,=>pharm co\u name char(30)主键,我没有意识到我不能内联声明两个主键。谢谢!@doy…一个表只能有一个主键。你似乎想要一个复合主键。