《MYSQL數據庫如何通過SQL找出2個表里值不同的列的方法》要點：
本文介紹了MYSQL數據庫如何通過SQL找出2個表里值不同的列的方法，希望對您有用。如果有疑問，可以聯系我們。
以下有兩個表,他們的結構完全相同,請通過SQL找出值不同的列.MYSQL數據庫
Student_1MYSQL數據庫
?MYSQL數據庫
?MYSQL數據庫
Student_2MYSQL數據庫
| NAME |
AGE |
SCORE |
| peter |
26 |
89 |
| jack |
25 |
96 |
| daniel |
26 |
48 |
| bark |
21 |
69 |
?MYSQL數據庫
方法一 -- NOT EXISTS：
MYSQL數據庫
代碼如下:
SELECT *
FROM Student_1 S1
WHERE NOT EXISTS
? (SELECT *
? FROM Student_2 S2
? WHERE S1.name = S2.name
? AND S1.age??? = S2.age
? AND S1.score? = S2.score
? )
UNION ALL
SELECT *
FROM STUDENT_2 S2
WHERE NOT EXISTS
? (SELECT *
? FROM STUDENT_1 S1
? WHERE S1.name = S2.name
? AND S1.age??? = S2.age
? AND S1.score? = S2.score
? );
方法二 -- MINUS
MYSQL數據庫
代碼如下:
(SELECT * FROM Student_1
MINUS
SELECT * FROM Student_2)
UNION ALL
(SELECT * FROM Student_2
MINUS
SELECT * FROM Student_1)
方法三 -- HAVING GROUP BY
MYSQL數據庫
代碼如下:
SELECT DISTINCT name, age, score FROM (
SELECT * FROM Student_1
UNION ALL
SELECT * FROM Student_2
)GROUP BY name, age, score HAVING COUNT(*)=1 ;
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