将表变量传递给存储过程

Question

我正在尝试创建一个可以传递一个列表的过程，该过程将输出中位数。现在，我有一个确定中值的程序；但是，我收到以下错误消息：我的@table表变量尚未声明，并且找不到存储过程。

我的中位手术程序：

CREATE OR ALTER PROCEDURE dbo.median
    (@table NUMERIC, 
     @median FLOAT OUTPUT)
AS 
    DECLARE @size AS NUMERIC
    SET @size = (SELECT COUNT(*) FROM @table)

    SET @median = (SELECT AVG(1) FROM (SELECT *, ROW_NUMBER() OVER(ORDER BY 1) AS ROW FROM @table) AS subquery
        WHERE subquery.ROW = ROUND(@size / 2, 0) OR subquery.ROW = ROUND(@size / 2, 0, 1))
    RETURN
GO

调用过程：

DECLARE @Arsenic TABLE(Ar FLOAT)
INSERT INTO @Arsenic SELECT Arsenic from dbo.HubspotWaterTestAverages

EXEC dbo.median (SELECT Arsenic FROM dbo.HubspotWaterTestAverages)

注意：砷表示水测试中的砷水平，值范围从零到10

预计该工作过程将仅返回该列的中间值，稍后我计划将其交叉连接到主表。谢谢您的帮助！

Answer 1

这可能会有所帮助。除了表变量必须使用表类型。

CREATE TABLE Employee 
(  
EmpId int NOT NULL,  
EmployeeName nvarchar(MAX),  
)
GO

CREATE TYPE EmployeeType AS TABLE  
(  
EmpId int NOT NULL,  
EmployeeName nvarchar(MAX)  
)
GO

CREATE  PROCEDURE PassTableTypeIntoProcedure(@EmployeeType EmployeeType READONLY)
AS
BEGIN
       INSERT INTO Employee
       SELECT * FROM @EmployeeType
END
GO

    DECLARE @EmployeeTypeVariable AS EmployeeType
    INSERT INTO @EmployeeTypeVariable  VALUES
    (1,'A'),
    ( 2,'B')

    EXEC PassTableTypeIntoProcedure @EmployeeTypeVariable
    GO
    SELECT * FROM Employee