如何编写一个在表中插入值的 MySQL 存储函数?
mysqlmysqli database更新于 2023/11/12 6:19:00
我们知道，当我们想要返回结果时，该函数最有用。因此，当我们创建存储函数来操作表(如插入或更新值)时，它或多或少类似于存储过程。
示例
在下面的示例中，我们创建了一个名为"tbl_insert"的存储函数，它将在名为"student_marks"的表中插入值。
mysql> Create Function tbl_insert(S_name Varchar(50),M1 INT,M2 INT,M3 INT,M4 INT)
-> RETURNS INT
-> DETERMINISTIC
-> BEGIN
-> INSERT INTO student_marks values(S_name,M1,M2,M3,M4);
-> RETURN 1;
-> END//
Query OK, 0 rows affected (0.00 sec)
mysql> Select tbl_insert('Saurabh',85,79,65,71);
+------------------------------+
| tbl_insert('RR',58,25,65,32) |
+------------------------------+
| 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 | NULL | 86 | 81 |
| Saurabh | 85 | 79 | 65 | 71 |
+---------+------+---------+---------+---------+
4 rows in set (0.00 sec)
