1064 SQL錯誤CREATE TABLE語句中

Question

蔭收到錯誤

#1064 - You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ''ID' int, 'MGR_ID' int, 'DEPT_ID' int, 'NAME' VARCHAR2(30), 'SAL' int, ' at line 3 while creating a table. I have already a table department with PK as 'dept_id'. Help lease 

CREATE TABLE emp 
(
'ID' int, 
'MGR_ID' int, 
'DEPT_ID' int, 
'NAME' VARCHAR2(30), 
'SAL' int, 
'DOJ' DATE, 
PRIMARY KEY ('ID') , 
FOREIGN KEY ('MGR_ID') REFERENCES emp('ID') , 
FOREIGN KEY ('DEPT_ID') REFERENCES department('dept_id') 
) 

Answer 1

使用反引號（'）來定義對象名稱，但不是單引號（'）。

你的表的定義應是：

CREATE TABLE emp 
(
    `ID` int, 
    `MGR_ID` int, 
    `DEPT_ID` int, 
    `NAME` VARCHAR2(30), 
    `SAL` int, 
    `DOJ` DATE, 
    PRIMARY KEY (`ID`) , 
    FOREIGN KEY (`MGR_ID`) REFERENCES emp(`ID`) , 
    FOREIGN KEY (`DEPT_ID`) REFERENCES department(`dept_id`) 
) 

Answer 2

不要'引用您的字段名稱。這將他們變成了字符串，而不是字段名稱。

CREATE TABLE emp (
    id int, 
    mgr_id int, 
    etc... 
); 

如果DO需要引用一個字段名稱，因爲它是一個保留字，你使用反引號：

CREATE TABLE emp (
    `desc` int <---"desc" is a reserved word 
    etc... 
); 

Answer 3

試試這個

CREATE TABLE emp 
(
    `ID` int (20), 
    `MGR_ID` int (20), 
    `DEPT_ID` int (20), 
    `NAME` VARCHAR (30), 
    `SAL` int (20), 
    `DOJ` DATE, 
    PRIMARY KEY (ID) , 
    FOREIGN KEY (MGR_ID) REFERENCES emp(ID) , 
    FOREIGN KEY (DEPT_ID) REFERENCES department(dept_id) 
    )