我必須找出輸出爲最高分的學生姓名嗎?我的兩個表都是 -從兩個表中獲取數據?
CREATE TABLE student(Fields_ID INT, Name VARCHAR(20));
INSERT INTO student(Fields_ID,Name) VALUES(30,'JYOTI');
INSERT INTO student(Fields_ID,Name) VALUES(31,'KIRTI');
INSERT INTO student(Fields_ID,Name) VALUES(32,'YOGITA');
INSERT INTO student(Fields_ID,Name) VALUES(33,'RASHMI');
INSERT INTO student(Fields_ID,Name) VALUES(34,'NUPUR');
SELECT * FROM student;
CREATE TABLE Marks(Fields_ID INT, Student_ID INT NOT NULL,marks INT NOT NULL);
INSERT INTO Marks(Fields_ID,Student_ID,Marks) VALUES (30,40,100);
INSERT INTO Marks(Fields_ID,Student_ID,Marks) VALUES (31,41,88);
INSERT INTO Marks(Fields_ID,Student_ID,Marks) VALUES (32,42,72);
INSERT INTO Marks(Fields_ID,Student_ID,Marks) VALUES (33,43,33);
INSERT INTO Marks(Fields_ID,Student_ID,Marks) VALUES (34,44,15);
SELECT * FROM Marks;
我試圖從下面的代碼返回所需的出來,但它不返回相同的。任何想法爲什麼它沒有返回正確的值。我是MySql的初學者,所以我無法找出問題所在。
SELECT student.name,Marks.marks
FROM student INNER JOIN Marks
ON student.Fields_ID=Marks.Fields_ID;
'Student_ID'鏈接到什麼? – hjpotter92
什麼數據被返回? – Andrew
這就是你需要[**小提琴**](http://sqlfiddle.com/#!2/a5324/2) –