使用SQL语句编写一个total存储过程完成计算1+2+3+...+n,其中n通过输入参数传入,运行结果通过输出参数传出。 2.1.编写一个total2存储过程,完成与上题相同功能,但结果不通过输出参数传出。 2.2. 将上题修改为函数,函数名为total3,完成功能相同。
时间: 2024-03-06 17:48:52 浏览: 20
好的,您的问题我已经接收到了。以下是SQL语句实现:
1.使用存储过程实现:
```sql
CREATE PROCEDURE total
@n INT,
@result INT OUTPUT
AS
BEGIN
DECLARE @i INT
SET @i = 1
SET @result = 0
WHILE @i <= @n
BEGIN
SET @result = @result + @i
SET @i = @i + 1
END
END
```
使用方法:
```sql
DECLARE @result INT
EXEC total @n = 10, @result = @result OUTPUT
PRINT @result
```
2.1 使用存储过程实现结果不传出:
```sql
CREATE PROCEDURE total2
@n INT
AS
BEGIN
DECLARE @i INT
DECLARE @result INT
SET @i = 1
SET @result = 0
WHILE @i <= @n
BEGIN
SET @result = @result + @i
SET @i = @i + 1
END
SELECT @result AS 'result'
END
```
使用方法:
```sql
EXEC total2 @n = 10
```
2.2 使用函数实现:
```sql
CREATE FUNCTION total3
(@n INT)
RETURNS INT
AS
BEGIN
DECLARE @i INT
DECLARE @result INT
SET @i = 1
SET @result = 0
WHILE @i <= @n
BEGIN
SET @result = @result + @i
SET @i = @i + 1
END
RETURN @result
END
```
使用方法:
```sql
SELECT dbo.total3(10)
```