如何编写一个在表中插入值的MySQL存储函数?
众所周知,要返回结果时最好使用该函数。因此,当我们将创建用于操作表的存储函数(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,我们将创建一个名为“tbl_insert”的存储函数,该函数会将值插入一个名为“student_marks”的表中。
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// Select tbl_insert('Saurabh',85,79,65,71); +------------------------------+ | tbl_insert('RR',58,25,65,32) | +------------------------------+ | 1 | +------------------------------+ 1 row in set (0.07 sec) 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)