如何将 table 中的值作为参数传递给存储过程？

Question

我正在努力解决一些看起来非常简单的问题，但我没有找到任何解决方案：

我 Table 称为 Hotels，它的第一列是 = [hotels_id] [int]
我有依赖于hotels_id值

现在在存储过程中，我只输入了一个值 (1) 作为示例，假设我有大约 50 行。

有什么方法可以将 table 中的所有行作为参数一次传递给 SP？我是说一个一个。

ALTER PROCEDURE [dbo].[spAvailableRooms]
AS
BEGIN
-- Derived tables
;with

DatesTable as
    (SELECT top (100) PERCENT Dates.dates_id as Id, Dates.dates_date as Date FROM Dates order by Dates.dates_id),

 AvaliablePerHotel as
    (SELECT top (100)percent Available_since AS Since, Available_value AS Value, Available_hotel as Hotel
                    FROM Available_rooms 
                    where  Available_hotel =1 --(HERE I NEED THE VALUES FROM TABLE)
                    ORDER BY Available_hotel, Available_since),

AllDays as
    (Select top (100)percent Id, Date, Value as Rooms, iif(value is null, '0' ,'1') as New, Hotel
        From DatesTable left JOIN AvaliablePerHotel ON Id = Since
        order by id),

AvailableGroups as
    (Select top (100)percent Hotel, Id, Date, Rooms, (sum(isnull(cast(new as float),0))over(order by id)) as RowGroup
    From AllDays
    order by id)
--

-- Query itself

Select Id, Date, iif(Rooms is null,(first_value(rooms) over (partition by RowGroup order by Id)) , Rooms) as  AvailableRooms,
        iif(Hotel is null,(first_value(Hotel) over (partition by RowGroup order by Id)) , Hotel) as  Hotel
From AvailableGroups
order by id

END

Answer 1

您可以使用用户定义的 Table 类型（更多信息 here）

首先定义一个类型，表示要传递给存储过程的结构：

CREATE TYPE [schemaName].[typeName] AS TABLE(
    [Column0] [nvarchar](255) NULL,
    [Column1] [nvarchar](255) NULL,
    [Column2] [nvarchar](255) NULL,
    [Column3] [nvarchar](255) NULL,
    [Column4] [nvarchar](255) NULL,
    [Column5] [nvarchar](255) NULL,
    [Column6] [nvarchar](255) NULL,
...
)

现在您可以创建一个存储过程，它将一个变量作为输入，该变量的类型是用前面的脚本定义的：

CREATE PROCEDURE [schemaName].[SpLoad]
(
    @myRows [schemaName].[typeName] READONLY
)
    AS
    BEGIN
        INSERT INTO schemaName.DestinationTable
        SELECT * FROM @myRows
    END

Answer 2

如果你想像你说的那样一个一个地传递值，那么游标是你最好的选择

declare @id int

DECLARE cursor CURSOR FOR   
SELECT hotels_id
FROM Hotels

OPEN cursor  

FETCH NEXT FROM cursor   
INTO @id

WHILE @@FETCH_STATUS = 0  
BEGIN  

    exec [dbo].[spAvailableRooms] @id

    FETCH NEXT FROM cursor   
    INTO @id
END   
CLOSE cursor;  
DEALLOCATE cursor;

然后在你的程序中改变传递一个参数

ALTER PROCEDURE [dbo].[spAvailableRooms] @id int

并用 @id

替换您在代码中硬编码“1”的位置

请注意，随着 table 的增长，游标是单线程的，执行时间将增长得非常快。

如何将 table 中的值作为参数传递给存储过程？

How do I pass values from a table to a stored procedure as parameters?

sql

sql-server

tsql

stored-procedures

ssms-2017