更新選擇語句多連接

Question

我試圖根據Project_CSTM表中的數據更新Contacts_CSTM表中的數據。這是我使用的查詢，但我得到一個錯誤：

ALTER PROCEDURE Insurance_Check_Expiration 
    @ID_C AS NVARCHAR (55) = ID_C 
    AS 
BEGIN  
SET NOCOUNT ON 
IF EXISTS(SELECT * FROM CONTACTS_CSTM WHERE ID_C = @ID_c) 

Update contacts_cstm set insurance_expired_label_c = 'INSURANCE EXPIRED' 
WHERE DRIVERS_LICENSE_NUMBER_C IS NOT NULL AND @ID_C= 
(SELECT cc.id_c 
FROM PROJECT_CSTM PC 
JOIN PROJECT P 
ON P.ID = PC.ID_C 
JOIN PROJECT_RELATION PR 
ON PR.PROJECT_ID = P.ID 
JOIN CONTACTS C 
ON C.ID = PR.RELATION_ID 
JOIN CONTACTS_CSTM CC 
ON CC.ID_C = C.ID 
WHERE CC.ID_C = @ID_C AND INSURANCE_EXPIRED_C ='1') 

謝謝「從字符串轉換爲uniqueidentifier時轉換失敗」。

Answer 1

其中之一，你將@ID_C的值設置爲一個值（ID_C），這顯然不是有效的GUID。

這是您所做的功能等同物，運行它，您將得到相同的錯誤。

CREATE PROCEDURE Insurance_Check_Expiration 
    @ID_C AS NVARCHAR (55) = ID_C 
    AS 
BEGIN  
DECLARE @A UNIQUEIDENTIFIER 

SET @A = @ID_C 


END 

exec Insurance_Check_Expiration 

編輯：這是一個基於業務方案的意見的功能例如：

CREATE TABLE GUIDExample (ID_C UNIQUEIDENTIFIER) 
GO 
CREATE PROC GuidExample_Insert @ID_C UNIQUEIDENTIFIER 
AS 
BEGIN 
    SELECT @ID_C 
END 
GO 
CREATE TRIGGER GUID_Example ON GUIDExample 
AFTER INSERT 
AS 
    DECLARE @ID_C UNIQUEIDENTIFIER 

    SELECT @ID_C = ID_C 
    FROM Inserted 


    EXEC GuidExample_Insert @ID_C 
GO 

DECLARE @SampleGUID UNIQUEIDENTIFIER 

SET @SampleGUID = NEWID() 

INSERT GUIDExample (ID_C) 
VALUES(@SampleGUID)