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开发人员上运行时，它会给我以下错误

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。

重命名专栏

session

到不是保留字的名称。你应该没事！

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。但是，如果要将其用作列名，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。

以下是SQLFiddle

在sql developer上运行Create table student时出错：CREATE TABLE学生

2 个答案: