Question

我正在尝试创建此函数（变量名称已更改，因此允许命名错误，因为测试原始时没有函数正常工作），

 CREATE FUNCTION [dbo].[GetQuality](@FruitID VARCHAR(200))
RETURNS varchar(200)
AS
BEGIN
DECLARE @Result varchar(200)

SET @Result = (

WITH 
latest AS
(
    SELECT * FROM (SELECT TOP 1 * FROM Fruits_Crate WHERE FruitID like @FruitID ORDER BY ExpiryDate DESC) a
), 
result AS
(
    SELECT 
        latest.ExpiryDate as LatestExpiryDate, latest.Size as LatestSize, latest.Weight as LatestWeight,
        previous.ExpiryDate as PreviousExpiryDate, previous.Size as PreviousSize, previous.Weight as PreviousWeight,
        CASE SIGN((latest.Weight * latest.Size) - (previous.Weight * previous.Size))
            WHEN 1 THEN 'Increased'
            WHEN 0 THEN 'Static'
            WHEN -1 THEN 'Decreased'
            ELSE 'No Previous Data'
        END AS Movement 
    FROM (SELECT TOP 1 * FROM (SELECT TOP 2 * FROM Fruits_Crate WHERE FruitID like @FruitID ORDER BY ExpiryDate DESC) x  ORDER BY ExpiryDate) previous
    FULL OUTER JOIN latest ON previous.FruitID = latest.FruitID
)

SELECT result.Movement AS FruitMovement from result;
)

RETURN @Result

END

错误

Msg 156，Level 15，State 1，Procedure GetQuality，Line 10   关键字＆＃39; WITH＆＃39;附近的语法不正确。

Msg 319，Level 15，State 1，Procedure GetQuality，Line 10   关键字＆＃39;与＆＃39;附近的语法不正确。如果此语句是公用表表达式，xmlnamespaces子句或更改跟踪上下文子句，则必须以分号终止先前的语句。

Msg 102，Level 15，State 1，Procedure GetQuality，Line 14   ＆＃39;，＆＃39;附近的语法不正确。消息102，级别15，状态1，过程GetQuality，第31行语法不正确＆＃39;）＆＃39;。

Answer 1

我认为你可以移动任务，并在with之前放一个半冒号，一切都应该是好的。

CREATE FUNCTION [dbo].[GetQuality](@FruitID VARCHAR(200))
RETURNS varchar(200)
AS
BEGIN
DECLARE @Result varchar(200);

WITH 
latest AS
(
    SELECT * FROM (SELECT TOP 1 * FROM Fruits_Crate WHERE FruitID like @FruitID ORDER BY ExpiryDate DESC) a
), 
result AS
(
    SELECT 
        latest.ExpiryDate as LatestExpiryDate, latest.Size as LatestSize, latest.Weight as LatestWeight,
        previous.ExpiryDate as PreviousExpiryDate, previous.Size as PreviousSize, previous.Weight as PreviousWeight,
        CASE SIGN((latest.Weight * latest.Size) - (previous.Weight * previous.Size))
            WHEN 1 THEN 'Increased'
            WHEN 0 THEN 'Static'
            WHEN -1 THEN 'Decreased'
            ELSE 'No Previous Data'
        END AS Movement 
    FROM (SELECT TOP 1 * FROM (SELECT TOP 2 * FROM Fruits_Crate WHERE FruitID like @FruitID ORDER BY ExpiryDate DESC) x  ORDER BY ExpiryDate) previous
    FULL OUTER JOIN latest ON previous.FruitID = latest.FruitID
)

SELECT @RESULT = result.Movement AS FruitMovement from result;


RETURN @Result

END

使用＆＃34;和＆＃34;创建函数创建功能

1 个答案: