通过SQL命令行创建表，标识符无效 [英] Creating table via SQL Command Line, invalid identifier

问题描述

我当前正在学习SQL，并且已经在系统上安装了oracle 11g express.我正在尝试创建表，但是当我尝试运行以下命令时，出现以下错误消息:

I'm currently learning SQL and I've installed oracle 11g express on my system. I'm trying to create a table however when I try to run the below command I get the following Error Message:

第3行出现错误:ORA-00904:无效的标识符

ERROR at line 3: ORA-00904 : invalid identifier

CREATE TABLE PROJECTS (
    proID       NUMBER(4) NOT NULL,
    Desc        CHAR(20),
    sDate       DATE,
    eDate       DATE,
    Budget      NUMBER(7,2),
    maxStaff    NUMBER(2)
);

有人可以告诉我我在做什么错吗?

Can anybody please tell me what I'm doing wrong?

感谢所有答复，我成功运行了此命令:

Thanks for all the replies, I ran this command succesfully:

CREATE TABLE PROJECTS (
    proID       NUMBER(4) NOT NULL,
    description CHAR(20),
    sDate       DATE,
    eDate       DATE,
    Budget      NUMBER(7,2),
    maxStaff    NUMBER(2)
);

真的很感谢您的快速回复！

Really Appreciate the fast replies!

克里斯

推荐答案

您输入的是 DESC 作为列名.虽然可以使用它，但必须将其用引号引起来:

You have DESC in as a column name. While you can use it you will have to encompass it in quotes:

CREATE TABLE PROJECTS (
    proID       NUMBER(4) NOT NULL,
    "Desc"        CHAR(20),
    sDate       DATE,
    eDate       DATE,
    Budget      NUMBER(7,2),
    maxStaff    NUMBER(2)
);

您每次在查询中调用引号时也必须使用引号.我建议仅将该列更改为其他内容(也许是 DESCRIPTION ?)

You will also have to use quotes every time you call it in a query. I recommend just changing that column to something else (maybe DESCRIPTION?)

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