如何限制在我的 SQL Server 函数中返回的行数？

如何解决如何限制在我的 SQL Server 函数中返回的行数？

CREATE FUNCTION [dbo].[GET_CUSTOMER_DATA]  
(   
    -- Add the parameters for the function here
    @customerID bigint,@maxRows int,@offset int,@rows int
)
RETURNS TABLE 
AS
RETURN 
(
    -- Add the SELECT statement with parameter references here
    SELECT *
        FROM SS_CustomerCard AS SS_CC 
        INNER JOIN SS_PersonalRepresentative AS SS_PR
        ON SS_PR.customerID = SS_CC.ID
        INNER JOIN SS_ApplicationStatus AS SS_AS
        ON SS_AS.CustomerID = SS_CC.ID
        WHERE
            SS_CC.ID='@customerID'
        ORDER BY SS_AS.EventDateTime DESC,SS_CC.FirstName DESC,SS_CC.LastName DESC
        OFFSET @offset ROWS
        FETCH NEXT @rows ROWS ONLY
)
GO

我想传递一个参数来限制返回的行数（maxRows）

解决方法

您可以在 TOP() 语句中使用 SELECT 子句。

这是一个概念性示例。

SQL

DECLARE @tbl TABLE (ID INT IDENTITY PRIMARY KEY,vehicleMake VARCHAR(20));
INSERT INTO @tbl (vehicleMake) VALUES
('Chevrolet'),('Tesla'),('Audi'),('Nissan');

DECLARE @tableVariable TABLE (ID INT,vehicleMake VARCHAR(20));

DECLARE @topRows INT = 2;

INSERT INTO @tableVariable
SELECT * 
FROM @tbl
ORDER BY id;

SELECT TOP(@topRows) *
FROM @tableVariable
ORDER BY id;

,

我认为您正在尝试限制 OFFSET/FETCH 之前的总行数。如果是这样，您需要将其放入子查询/派生表中，并添加另一个ORDER BY：

CREATE FUNCTION [dbo].[GET_CUSTOMER_DATA]  
(   
    -- Add the parameters for the function here
    @customerID bigint,@maxRows int,@offset int,@rows int
)
RETURNS TABLE 
AS
RETURN 
(
    SELECT *
    FROM (
        SELECT TOP (@maxRows) all_needed_columns_here_aliased_if_necessary
        FROM SS_CustomerCard AS SS_CC 
        INNER JOIN SS_PersonalRepresentative AS SS_PR
          ON SS_PR.customerID = SS_CC.ID
        INNER JOIN SS_ApplicationStatus AS SS_AS
          ON SS_AS.CustomerID = SS_CC.ID
        WHERE
            SS_CC.ID=@customerID
        ORDER BY SS_AS.EventDateTime DESC,SS_CC.FirstName DESC,SS_CC.LastName DESC
    ) t
    ORDER BY EventDateTime DESC,FirstName DESC,LastName DESC
    OFFSET @offset ROWS
    FETCH NEXT @rows ROWS ONLY
)
GO