如何调用存储过程并返回值?

2021-09-10 00:00:00 tsql sql-server

大家好，我有一个存储过程，我需要在另一个存储过程中调用它，但我希望第一个返回一个值(字段值).

Hey all, I have a stored procedure and I need to call it within another stored procedure, but I want the first one to return a value (field value).

CREATE PROCEDURE rnd_STR
(
    @Length int

)

@alphaVar varchar(10) OUTPUT
AS
SET @alphaVar = 'blah'

 #procedure body
END
GO

DECLARE @alphaVar varchar(10)

EXEC rnd_STR @alphaVar output

SELECT @alphaVar

错误

消息 102，级别 15，状态 1，过程 rnd_STR，第 6 行

Msg 102, Level 15, State 1, Procedure rnd_STR, Line 6

'@alphaVar' 附近的语法不正确.

Incorrect syntax near '@alphaVar'.

消息 137，级别 15，状态 1，过程 rnd_STR，第 8 行

Msg 137, Level 15, State 1, Procedure rnd_STR, Line 8

必须声明标量变量@alphaVar".

Must declare the scalar variable "@alphaVar".

消息 2812，级别 16，状态 62，第 4 行

Msg 2812, Level 16, State 62, Line 4

找不到存储过程rnd_STR".

Could not find stored procedure 'rnd_STR'.

(1 行受影响)

没用！！

我怎么称呼它??

顺便说一句，返回的@ID 是一个字符串

推荐答案

你说 @alphaVar 是 varchar(10).在这种情况下，您需要使用如下输出参数.Return 只能用于存储过程中的整数类型.

You say @alphaVar is varchar(10). In that case you need to use an output parameter as below. Return can only be used for integer types in stored procedures.

CREATE PROCEDURE rnd_STR
@Length int,
@alphaVar varchar(10) OUTPUT    
AS
BEGIN
SET @alphaVar = 'blah'
/* Rest of procedure body*/
END

GO

DECLARE @alphaVar varchar(10) 

EXEC rnd_STR 10, @alphaVar output

SELECT @alphaVar

或者，您可以使用标量 UDF 而不是存储过程.

Alternatively you could use a scalar UDF rather than a stored procedure.

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