在MySQL的ALTER TABLE中添加约束的SQL语法错误

Question

I have another SQL error that says

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 'ADD CONSTRAINT fk_org1_id FOREIGN KEY ( org_ID ) REFERENCES organization (`o' at line 1

I don't know why I have this error when in fact, I followed correctly the proper syntax for adding a constraint in ALTER TABLE. Can someone help me?

Here is my sql code:

ALTER TABLE `administration`
ADD CONSTRAINT `fk_stud3_id` FOREIGN KEY (`stud_ID`) REFERENCES   `student` (`stud_ID`),
ADD CONSTRAINT `fk_faculty3_ID` FOREIGN KEY (`faculty_ID`) REFERENCES `faculty` (`faculty_ID`);
ADD CONSTRAINT `fk_org1_id` FOREIGN KEY (`org_ID`) REFERENCES `organization` (`org_ID`)

ALTER TABLE `student_list`
ADD CONSTRAINT `fk_stud4_id` FOREIGN KEY (`stud_ID`) REFERENCES `student` (`stud_ID`),
ADD CONSTRAINT `fk_admin2_id` FOREIGN KEY (`admin_ID`) REFERENCES `administration` (`admin_ID`);

Answer 1

You have terminated your query on wrong place.

Your query is:

ALTER TABLE `administration`
ADD CONSTRAINT `fk_stud3_id` FOREIGN KEY (`stud_ID`) REFERENCES   `student` (`stud_ID`),
ADD CONSTRAINT `fk_faculty3_ID` FOREIGN KEY (`faculty_ID`) REFERENCES `faculty` (`faculty_ID`);
ADD CONSTRAINT `fk_org1_id` FOREIGN KEY (`org_ID`) REFERENCES `organization` (`org_ID`)

should be-

ALTER TABLE `administration`
ADD CONSTRAINT `fk_stud3_id` FOREIGN KEY (`stud_ID`) REFERENCES   `student` (`stud_ID`),
ADD CONSTRAINT `fk_faculty3_ID` FOREIGN KEY (`faculty_ID`) REFERENCES `faculty` (`faculty_ID`),
ADD CONSTRAINT `fk_org1_id` FOREIGN KEY (`org_ID`) REFERENCES `organization` (`org_ID`);

Answer 2

Small mistake, remove ; semicolon

ALTER TABLE `administration` ADD CONSTRAINT `fk_stud3_id` FOREIGN KEY (`stud_ID`) REFERENCES   `student` (`stud_ID`),
ADD CONSTRAINT `fk_faculty3_ID` FOREIGN KEY (`faculty_ID`)
    REFERENCES `faculty` (`faculty_ID`);// here change semicolon to comma.
ADD CONSTRAINT `fk_org1_id` FOREIGN KEY (`org_ID`) 
    REFERENCES `organization` (`org_ID`); // add semicolon here.