在 Oracle Database 11g SQL 中创建 table 时出错

Question

我是 SQL 的新手，我正在尝试创建一个新的 table 但是当我在 SQL 中运行我的脚本时出现错误命令行，我得到的错误是 ORA-00942 缺少右括号或 ORA-00942 table 或视图不存在。

哦，是的，我知道我可能写了一些糟糕的脚本，但如前所述，我正在学习，所以任何有意义的批评和一些帮助都将不胜感激:)。

CREATE TABLE Branch
(
Branch_ID varchar(5),
Branch_Name varchar(255),
Branch_Address varchar(255),
Branch_Town varchar(255),
Branch_Postcode varchar(10),
Branch_Phone varchar(50),
Branch_Fax varchar(50),
Branch_Email varchar(50),
Property_ID varchar(5),
Contract_ID varchar(5),
Staff_ID varchar(5),
PRIMARY KEY (Branch_ID),
FOREIGN KEY (Property_ID) REFERENCES Property(Property_Id),
FOREIGN KEY (Contract_ID) REFERENCES Contract(Contract_Id),
FOREIGN KEY (Staff_ID) REFERENCES Staff(Staff_Id)
); 

CREATE TABLE Staff 
(
Staff_ID varchar(5),
Staff_Forename varchar(255),
Staff_Surname varchar(255),
Staff_Address varchar(255),
Staff_Town varchar(255)
Staff_Postcode varchar(10),
Staff_Phone varchar(50),
Staff_DOB varchar(50),
Staff_NIN varchar(10),
Staff_Salary varchar(50),
Staff_Date_Joined varchar(100),
Staff_Viewing_Arranged varchar(100),
Branch_ID varchar(5),
Sales_ID varchar(5),
PRIMARY KEY (Staff_ID),
FOREIGN KEY (Branch_ID) REFERENCES Branch(Branch_ID),
FOREIGN KEY (Sales_ID) REFERENCES Sales(Sales_Id)
);

CREATE TABLE Sales 
(
Sales_ID varchar(5),
Property_Address varchar(255),
Property_Town varchar(255)
Property_Postcode varchar(10),
Property_Type varchar(255),
Num_Rooms varchar(50),
Date_of_Sale varchar(10),
Sales_Bonus varchar(100),
Branch_ID varchar(5),
Property_ID varchar(5),
Staff_ID varchar(5)
Seller_ID varchar(5),
PRIMARY KEY (Sales_ID),
FOREIGN KEY (Branch_ID) REFERENCES Branch(Branch_ID),
FOREIGN KEY (Property_ID) REFERENCES Property(Property_Id),
FOREIGN KEY (Staff_ID) REFERENCES Staff(Staff_Id),
FOREIGN KEY (Seller_ID) REFERENCES Seller(Seller_Id)
);

CREATE TABLE Contract 
(
Contract_ID varchar(5),
Contract_Signed_Date varchar(50),
Property_ID varchar(5),
Buyer_ID varchar(5),
Seller_ID varchar(5),
Branch_ID varchar(5),
PRIMARY KEY (Contract_ID),
FOREIGN KEY (Branch_ID) REFERENCES Branch(Branch_ID),
FOREIGN KEY (Property_ID) REFERENCES Property(Property_Id),
FOREIGN KEY (Seller_ID) REFERENCES Seller(Seller_Id),
FOREIGN KEY (Buyer_ID) REFERENCES Buyer(Buyer_Id)
);

CREATE TABLE Buyer 
(
Buyer_ID varchar(5),
Viewing_Data varchar(255),
Maximum_Budject varchar(255),
Purchase_Price varchar (50),
Buyer_Forename varchar(255),
Buyer_Surname varchar(255),
Buyer_Address varchar(255),
Buyer_Town varchar(255),
Buyer_Postcode varchar(10),
Property_ID varchar(5),
Contract_ID varchar(5),
Survey_ID varchar(5),
PRIMARY KEY (Buyer_ID),
FOREIGN KEY (Property_ID) REFERENCES Property(Property_ID),
FOREIGN KEY (Contract_ID) REFERENCES Contract(Contract_Id),
FOREIGN KEY (Survey_ID) REFERENCES Survey(Survey_Id)
);

CREATE TABLE Seller 
(
Seller_ID varchar(5),
Seller_Forename varchar(255),
Seller_Surname varchar(255),
Seller_Address varchar(255),
Seller_Town varchar(255),
Seller_Postcode varchar(10),
Seller_Property_ID varchar(5),
No_of_Bed varchar(5),
Contract_ID varchar(5),
Property_ID varchar(5),
Sales_ID varchar(5),
PRIMARY KEY (Seller_ID),
FOREIGN KEY (Contract_ID) REFERENCES Contract(Contract_ID),
FOREIGN KEY (Property_ID) REFERENCES Property(Property_Id),
FOREIGN KEY (Sales_ID) REFERENCES Sales(Sales_Id)
);

CREATE TABLE Property 
(
Property_ID varchar(5),
Property_Address varchar(255),
Property_Town varchar(255),
Property_Postcode varchar(10),
Asking_Price varchar(20),
Date_Registered varchar(50),
Property_Fixtures varchar(255),
Size_of_Rooms varchar(100),
Buyer_ID varchar(5),
Staff_ID varchar(5),
Contract_ID varchar(5),
Seller_ID varchar(5),
PRIMARY KEY (Property_ID),
FOREIGN KEY (Buyer_ID) REFERENCES Buyer(Buyer_ID),
FOREIGN KEY (Seller_ID) REFERENCES Seller(Seller_ID),
FOREIGN KEY (Staff_ID) REFERENCES Staff(Staff_Id),
FOREIGN KEY (Contract_ID) REFERENCES Contract(Contract_Id)
);

CREATE TABLE Survey 
(
Survey_ID varchar(5),
No_of_Survey varchar(10),
Survey_Type varchar(255),
Organised_By varchar(255),
Property_ID varchar(5),
Staff_ID varchar(5),
Buyer_ID varchar(5),
PRIMARY KEY (Survey_ID),
FOREIGN KEY (Property_ID) REFERENCES Property(Property_ID),
FOREIGN KEY (Staff_ID) REFERENCES Staff(Staff_Id),
FOREIGN KEY (Buyer_ID) REFERENCES Buyer(Buyer_Id)
);

CREATE TABLE Advert
(
Survey_ID Advert_ID varchar(5),
No_of_Adverts varchar(10),
Advert_Website varchar(255),
Advert_Newspaper varchar(255),
Property_ID varchar(5),
PRIMARY KEY (Advert_ID),
FOREIGN KEY (Property_ID) REFERENCES Property(Property_ID)
);

Answer 1

STAFF Table最后漏了一个,

Staff_Town varchar(255)

Sales Table 也是

Property_Town varchar(255) 
Staff_ID varchar(5)

此外，您不能定义对table尚未创建的约束。我可以找到删除这些约束的错误。

Answer 2

在创建所引用的 table 之前无法定义外键引用。所以，如果外键引用是循环的，在 A => B => C => A 中，你首先必须创建 tables，然后使用 ALTER TABLE 来定义外键键。否则，按顺序创建 table，首先创建 table，然后创建引用它的 table。

Answer 3

您的脚本引用了尚未创建的表。即，查看您的第一个 create table。到那时，STAFF 和其他表还不存在，但您将它们设置为外键引用。

你应该先创建你的表，然后在依赖关系到位后应用约束，使用 alter:

ALTER TABLE BRANCH
ADD CONSTRAINT fk_staff_id
  FOREIGN KEY (Staff_ID) REFERENCES Staff(Staff_Id);

Answer 4

因为您有相互引用的表，所以您需要在创建表之后创建引用

--create table Buyer CREATE TABLE Buyer ( Buyer_ID varchar(5), Property_ID varchar(5), PRIMARY KEY (Buyer_ID) ); --create table Property CREATE TABLE Property ( Property_ID varchar(5), Buyer_ID varchar(5), PRIMARY KEY (Property_ID) ); --now you can set your reference constraints ALTER TABLE Property Add FOREIGN KEY (Buyer_ID) REFERENCES Buyer(Buyer_ID); ALTER TABLE Buyer Add FOREIGN KEY (Property_ID) REFERENCES Property(Property_ID);

Answer 5

您的按键语法不清晰。

下面是使用主键和外键 (fk) 创建 table 的示例：

 CREATE TABLE animals (
             animal_id             NUMBER(10) PRIMARY KEY,
             animal_name           VARCHAR2(50) NOT NULL,
             animal_species_code   NUMBER(50) NOT NULL
    CONSTRAINT fk_animal_species REFERENCES animal_species
                         (species_code));

Answer 6

看起来这组 table 中的建模可能会受益于一些添加和更改。

例如，STAFF table 引用了 BRANCH table - 但 BRANCH 也引用了 STAFF。这意味着 BRANCH 只能引用一个 STAFF，反之亦然，我怀疑这不是我们想要的。看起来您想要 BRANCH 和 STAFF 之间的多对多关系，启用此关系的标准解决方案是连接 table - 一个包含两个 table 的主键的连接。 BRANCH 和 STAFF 之间的这种连接 table 可能看起来像：

CREATE TABLE BRANCH_STAFF
  (BRANCH_ID  VARCHAR(5)
     CONSTRAINT BRANCH_STAFF_FK1
       REFERENCES BRANCH(BRANCH_ID),
   STAFF_ID   VARCHAR(5)
     CONSTRAINT BRANCH_STAFF_FK2
       REFERENCES STAFF(STAFF_ID),
   CONSTRAINT PK_BRANCH_STAFF
     PRIMARY KEY (BRANCH_ID, STAFF_ID)
     USING INDEX);

祝你好运。

在 Oracle Database 11g SQL 中创建 table 时出错

Error when creating table in Oracle Database 11g SQL

sql

oracle

ddl