将 table 变量传递给存储过程

Question

我正在寻求创建一个可以传递一列的程序 table，该程序将输出中位数。现在我有一个程序可以确定中位数；但是，我收到错误消息，指出我的 @table table 变量尚未声明，并且找不到存储过程。

我的程序中位数：

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：Arsenic 表示水质测试结果的砷含量，取值范围从 null 到 10

工作程序预计只是 return 列的中值，稍后我计划将其交叉连接到主 table。感谢您的帮助！

Answer 1

这可能会有所帮助。除了 table 变量必须使用 Table 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

将 table 变量传递给存储过程

Passing a table variable to a stored procedure

sql

sql-server

ssms