sql - PL/SQL过程中此处不允许ORA-00984列

create or replace procedure pro_enroll(sname_in IN varchar, cname_in IN varchar)
as
sno STUDENT.snum%type;
begin
    SELECT snum INTO sno FROM STUDENT WHERE sname=sname_in;
    --dbms_output.put_line(sno || chr(9) || sname_in || chr(9) || cname_in);
    INSERT INTO ENROLLED(snum, cname) VALUES(sno, c_name_in);
end pro_enroll;
/

SELECT * FROM ENROLLED;

begin
pro_enroll('M.Lee', 'CS448');
pro_enroll('A.Smith', 'ENG320');
end;
/

SELECT * FROM ENROLLED;

为什么我收到“这里不允许ORA-00984列”？
在ENROLLED中:

CREATE TABLE ENROLLED
(
snum INTEGER NOT NULL,
cname VARCHAR(30) NOT NULL,
PRIMARY KEY (snum, cname),
FOREIGN KEY (snum) REFERENCES STUDENT(snum),
FOREIGN KEY (cname) REFERENCES CLASS(cname)
);

最佳答案

您已经在c_name_in中使用了参数的INSERT名称，但是，过程的参数的实际名称是cname_in，而在_和c之间没有name符号，这有效:

create or replace procedure pro_enroll(sname_in IN varchar, cname_in IN varchar)
as
sno STUDENT.snum%type;
begin
    SELECT snum INTO sno FROM STUDENT WHERE sname=sname_in;
    --dbms_output.put_line(sno || chr(9) || sname_in || chr(9) || cname_in);
    INSERT INTO ENROLLED(snum, cname) VALUES(sno, cname_in);
end pro_enroll;
/