在 SQL Developer 上运行创建表学生时出错：CREATE TABLE Students

Question

CREATE TABLE students (
Year          NUMBER(4) NOT NULL,
Semester VARCHAR2(1) NOT NULL CONSTRAINT stu_sem_ck CHECK (semester IN ('1', '2', '3')),
department    VARCHAR2(3) NOT NULL,
course_number NUMBER NOT NULL,
session       VARCHAR2(3),
first_name    NVARCHAR2(10),
Middle_name   NVARCHAR2(15),
last_name     NVARCHAR2(15) NOT NULL,
id            NUMBER(9) NOT NULL,
area_code     VARCHAR2(3),
phone_number  VARCHAR2(7),
email_address NVARCHAR2(60),
Street1       NVARCHAR2(20),
street2       NVARCHAR2(20),
city          NVARCHAR2(20),
State_prov    NVARCHAR2(20),
country       CHAR(2),
postal_code   NVARCHAR2(15),
language      CHAR(2),
CONSTRAINT student_pk PRIMARY KEY (id))

在 SQL 开发者上运行时，它给我以下错误

Error starting at line 2 in command:
CREATE TABLE students (
Year          NUMBER(4) NOT NULL,
Semester VARCHAR2(1) NOT NULL CONSTRAINT stu_sem_ck CHECK (semester IN ('1', '2', '3')),
department    VARCHAR2(3) NOT NULL,
course_number NUMBER NOT NULL,
session       VARCHAR2(3),
first_name    NVARCHAR2(10),
Middle_name   NVARCHAR2(15),
last_name     NVARCHAR2(15) NOT NULL,
id            NUMBER(9) NOT NULL,
area_code     VARCHAR2(3),
phone_number  VARCHAR2(7),
email_address NVARCHAR2(60),
Street1       NVARCHAR2(20),
street2       NVARCHAR2(20),
city          NVARCHAR2(20),
State_prov    NVARCHAR2(20),
country       CHAR(2),
postal_code   NVARCHAR2(15),
language      CHAR(2),
CONSTRAINT student_pk PRIMARY KEY (id))
Error at Command Line:6 Column:1
Error report:
SQL Error: ORA-00904: : invalid identifier
00904. 00000 -  "%s: invalid identifier"
*Cause:    
*Action:
Error starting at line 1 in command:
CREATE TABLE students (

Answer 1

SESSION

是Oracle保留字，不允许重新定义保留字的含义。

重命名您的列

session

非保留字的名称。你应该没事吧！

参考 - http://docs.oracle.com/cd/B10501_01/appdev.920/a42525/apb.htm

Answer 2

SESSION是Oracle中的保留关键字。但如果您想将其用作列名，请使用双引号。因此改变

session       VARCHAR2(3),

到

"session"       VARCHAR2(3),

否则只需重命名该列即可。

这里是SQLFiddle

Answer 3

1-创建学生表，其中包含 id(pk)、名字、姓氏、地址、城市、国家/地区 2-添加列电话 3-删除列国家 4-删除表学生