Question

我正在尝试在Oracle 11g中创建表，但是出现ORA-00904错误。创建表的语法为：

make check

我得到的错误是：

CREATE TABLE Worker(
nif VARCHAR2(9 CHAR) CONSTRAINT PK_Nif PRIMARY KEY,
nameworker VARCHAR2(50 CHAR) CONSTRAINT NN_NameWorker NOT NULL,
specialty VARCHAR2(50 CHAR) CONSTRAINT NN_Specialty NOT NULL,
CONSTRAINT CH_Speciality CHECK (speciality ='ENGINEERING' OR speciality= 'SUPPORT' OR speciality='DEVELOPMENT'),
yearsold INTEGER,
CONSTRAINT CH_Years CHECK (yearsold >= 1),
CONSTRAINT NN_Years NOT NULL,
nifCompany VARCHAR2(9 CHAR) CONSTRAINT NN_NifCompany NOT NULL,
CONSTRAINT FK_NifCompany FOREIGN KEY (nifCompany) REFERENCES Company(nif)
);

我不知道错误在哪里。

Answer 1

您有几个问题；错误的直接原因是此行：

CONSTRAINT NN_Years NOT NULL,

基于先前的命名，您可能打算在列定义中包括内联：

yearsold INTEGER CONSTRAINT NN_Years NOT NULL,
CONSTRAINT CH_Years CHECK (yearsold >= 1),

第二个问题是，列定义中的名称specialty与检查约束中的speciality不一致。因此您需要修复列名和非空约束名称：

speciality VARCHAR2(50 CHAR) CONSTRAINT NN_Specialty NOT NULL,

修复这些问题，并假设您确实有一个Company表，该表具有与此指定的FK匹配的PK，将为您提供：

CREATE TABLE Worker(
  nif VARCHAR2(9 CHAR) CONSTRAINT PK_Nif PRIMARY KEY,
  nameworker VARCHAR2(50 CHAR) CONSTRAINT NN_NameWorker NOT NULL,
  speciality VARCHAR2(50 CHAR) CONSTRAINT NN_Specialty NOT NULL,
  CONSTRAINT CH_Speciality CHECK (speciality = 'ENGINEERING'
    OR speciality = 'SUPPORT' OR speciality = 'DEVELOPMENT'),
  yearsold INTEGER CONSTRAINT NN_Years NOT NULL,
  CONSTRAINT CH_Years CHECK (yearsold >= 1),
  nifCompany VARCHAR2(9 CHAR) CONSTRAINT NN_NifCompany NOT NULL,
  CONSTRAINT FK_NifCompany FOREIGN KEY (nifCompany) REFERENCES Company(nif)
);

Table WORKER created.

desc worker

Name       Null?    Type              
---------- -------- ----------------- 
NIF        NOT NULL VARCHAR2(9 CHAR)  
NAMEWORKER NOT NULL VARCHAR2(50 CHAR) 
SPECIALITY NOT NULL VARCHAR2(50 CHAR) 
YEARSOLD   NOT NULL NUMBER(38)        
NIFCOMPANY NOT NULL VARCHAR2(9 CHAR)

Answer 2

我认为问题是您在列定义期间指定约束名称。你不能这样做。如果要给约束起名字，则应指定不同的约束。试试：

CREATE TABLE Worker(
nif VARCHAR2(9 CHAR) ,
nameworker VARCHAR2(50 CHAR) ,
specialty VARCHAR2(50 CHAR),
CONSTRAINT CH_Speciality CHECK (speciality ='ENGINEERING' OR speciality= 'SUPPORT' OR speciality='DEVELOPMENT'),
yearsold INTEGER,
CONSTRAINT CH_Years CHECK (yearsold >= 1),
CONSTRAINT NN_Years check(yearold is NOT NULL),
nifCompany VARCHAR2(9 CHAR) ,
CONSTRAINT FK_NifCompany FOREIGN KEY (nifCompany) REFERENCES Company(nif),
CONSTRAINT PK_Nif PRIMARY KEY(nif),
CONSTRAINT NN_NameWorker check(nameworker is NOT NULL),
CONSTRAINT NN_Specialty check(specialty is NOT NULL),
CONSTRAINT NN_NifCompany check(nifCompany is NOT NULL)
);

让我知道您是否还有其他问题

创建Oracle表无效标识符时出错

2 个答案: