眾所周知，當我們想要傳回結果時，最好使用函數。因此，當我們建立儲存函數來操作表（例如插入或更新值）時，它或多或少類似於預存程序。在下面的範例中，我們將建立一個名為「tbl_update」的儲存函數，它將更新名為「student_marks」的表中的值。
mysql> Select * from student_marks//
+---------+------+---------+---------+---------+
| Name | Math | English | Science | History |
+---------+------+---------+---------+---------+
| Raman | 95 | 89 | 85 | 81 |
| Rahul | 90 | 87 | 86 | 81 |
| Mohit | 90 | 85 | 86 | 81 |
| Saurabh | NULL | NULL | NULL | NULL |
+---------+------+---------+---------+---------+
4 rows in set (0.00 sec)
mysql> Create Function tbl_Update(S_name Varchar(50),M1 INT,M2 INT,M3 INT,M4 INT)
-> RETURNS INT
-> DETERMINISTIC
-> BEGIN
-> UPDATE student_marks SET Math = M1,English = M2, Science = M3, History =M4 WHERE Name = S_name;
-> RETURN 1;
-> END //
Query OK, 0 rows affected (0.03 sec)
mysql> Select tbl_update('Saurabh',85,69,75,82);
+------------------------------------+
| tbl_update('Saurabh',85,69,75,82) |
+------------------------------------+
| 1 |
+------------------------------------+
1 row in set (0.07 sec)
mysql> Select * from Student_marks;
+---------+------+---------+---------+---------+
| Name | Math | English | Science | History |
+---------+------+---------+---------+---------+
| Raman | 95 | 89 | 85 | 81 |
| Rahul | 90 | 87 | 86 | 81 |
| Mohit | 90 | 85 | 86 | 81 |
| Saurabh | 85 | 69 | 75 | 82 |
+---------+------+---------+---------+---------+
4 rows in set (0.00 sec)以上是如何寫一個 MySQL 儲存函數來更新表中的值？的詳細內容。更多資訊請關注PHP中文網其他相關文章！
