-- 课程表
CREATE TABLE Course
(
    ID NUMBER(4),
    NAME VARCHAR2(20),
    ExamineTime DATE
);

INSERT INTO Course VALUES(1, '数学', to_date('20120301', 'YYYYMMDD'));
INSERT INTO Course VALUES(2, '语文', to_date('20120301', 'YYYYMMDD'));
INSERT INTO Course VALUES(3, '政治', to_date('20120301', 'YYYYMMDD'));

-- 报名表
CREATE TABLE Registe
(
    ID NUMBER(4),
    CourseID NUMBER(4),
    SchoolName VARCHAR2(20),
    StudentID NUMBER(4)
);

INSERT INTO Registe VALUES(1, 1, '学校A', '0001');
INSERT INTO Registe VALUES(2, 1, '学校A', '0002');
INSERT INTO Registe VALUES(3, 1, '学校B', '0003');
INSERT INTO Registe VALUES(4, 1, '学校B', '0004');

INSERT INTO Registe VALUES(5, 2, '学校A', '0005');
INSERT INTO Registe VALUES(6, 2, '学校A', '0006');
INSERT INTO Registe VALUES(7, 2, '学校B', '0007');
INSERT INTO Registe VALUES(8, 2, '学校B', '0008');

INSERT INTO Registe VALUES(9, 3, '学校A', '0009');
INSERT INTO Registe VALUES(10, 3, '学校A', '0010');
INSERT INTO Registe VALUES(11, 3, '学校B', '0011');
INSERT INTO Registe VALUES(12, 3, '学校B', '0012');

CREATE VIEW VTemp AS 
SELECT SchoolName, NAME, COUNT(1) AS n
FROM Registe r INNER JOIN Course c
ON r.courseid = c.ID
GROUP BY SchoolName, NAME;
SELECT * FROM VTemp;