聯接兩個表成為一個記錄

Question

我有兩個這樣的桌子 我想將這兩個表加入這個

Student ID SubjectID UTS UAS
1          1         80  80
1          2         88  88

感謝您的幫助。

Answer 1

只需使用內部聯接

SELECT A.*, B.UAS
FROM tbl1 AS A JOIN tbl2 AS B ON A.StudentID = B.StudentID AND A.SubjectID = B.SubjectID

Answer 2

SELECT t1.*, t2.UAS
    FROM uts AS t1 
    LEFT JOIN uas AS t2
        ON t1.StudentID = t2.StudentID AND t1.SubjectID = t2.SubjectID

您只需要在兩個公共列上連接兩個表。

Answer 3

JOIN子句用於根據兩個或多個表之間的相關列來組合它們。

   select t1.*,t2.UAS from table1 t1 
     inner join table2 t2 
     ON t1.StudentID = t2.StudentID AND
     t1.SubjectID = t2.SubjectID

有關加入的詳細信息，您可以閱讀一些教程https://www.w3schools.com/sql/sql_join.asp