mysql> Delimiter //
mysql> CREATE PROCEDURE fact(IN x INT)
-> BEGIN
-> DECLARE result INT;
-> DECLARE i INT;
-> SET result = 1;
-> SET i = 1;
-> WHILE i SET result = result * i;
-> SET i = i + 1;
-> END WHILE;
-> SELECT x AS Number, result as Factorial;
-> END//
Query OK, 0 rows affected (0.17 sec)
现在，当通过传递我们想要获取阶乘作为参数的值来调用此过程时 -
mysql> Delimiter ;
mysql> CALL Fact(5);
+--------+-----------+
| Number | Factorial |
+--------+-----------+
| 5 | 120 |
+--------+-----------+
1 row in set (0.00 sec)
Query OK, 0 rows affected (0.00 sec)
mysql> CALL Fact(6);
+--------+-----------+
| Number | Factorial |
+--------+-----------+
| 6 | 720 |
+--------+-----------+
1 row in set (0.00 sec)
Query OK, 0 rows affected (0.00 sec)
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