使用傳遞多個值的條件的sql server

Question

我正在嘗試將1到10條條件傳遞給在下面的此過程中使用以下select語句的存儲過程：

ALTER PROCEDURE [dbo].[Original_Docs]  
@Cat varchar(255),
@docType VARCHAR(255),
@IdNo VARCHAR(50)

AS
BEGIN


SELECT 
    d4.id as DOCUMENT_ID, c.name as Category, dt.name as Document_Type, 
    mv1.value as GUIDELINE_MASTER, mv2.value as ID_NUMBER, mv3.value as [DATE],
    mv4.value as DESCRIPTION, mv5.value AS BUDGET_NUM, mv6.value as STATUS,
    mv7.value AS [CLOSED DATE], mv8.value AS REPORT_TYPE 
FROM Documents d4 
JOIN ( 
    SELECT d2.id 
    FROM Documents d2 
    JOIN (
        SELECT d.fileStoreId, MIN(d.createdDate) as CreatedDate 
        FROM Documents d 
        JOIN FileStores fs ON d.fileStoreId = fs.id 
        WHERE fs.shared = 1 AND d.dateDeleted IS NULL 
        GROUP BY d.fileStoreId
    ) AS f ON d2.fileStoreId = f.fileStoreId AND d2.createdDate = f.CreatedDate

    UNION 

    SELECT d3.id 
    FROM Documents d3 
    JOIN FileStores fs2 ON d3.fileStoreId = fs2.id 
    WHERE fs2.shared = 0 AND d3.dateDeleted IS NULL
) AS f2 ON f2.id = d4.id 
JOIN DocumentTypes dt ON d4.documentTypeId = dt.id 
JOIN Categories c ON dt.categoryId = c.id 
LEFT OUTER JOIN mv_guideline_master mv1 ON d4.id = mv1.documentId 
LEFT OUTER JOIN mv_id_number mv2 ON d4.id = mv2.documentId 
LEFT OUTER JOIN mv_date mv3 ON d4.id = mv3.documentId 
LEFT OUTER JOIN mv_description mv4 ON d4.id = mv4.documentId 
LEFT OUTER JOIN mv_budgetnum mv5 ON d4.id = mv5.documentId 
LEFT OUTER JOIN mv_status mv6 ON d4.id = mv6.documentId 
LEFT OUTER JOIN mv_closed_date mv7 ON d4.id = mv7.documentId 
LEFT OUTER JOIN mv_report_type mv8 ON d4.id = mv8.documentId 
WHERE c.name = @Cat AND (dt.name = @docType OR mv2.value = @IdNo) 
ORDER BY mv1.value 

在弄清楚如何用3條標准完成后，我將需要添加其他標准。 在where子句中，我傳遞了@ Cat，@ docType和@IdNo參數。 如何使用這些條件查詢，其中一個用另一個或兩個空白填充？ 或者，如果所有這些都傳入了，或者僅傳入了2個。如果我使用AND，那么它不起作用，或者如果我在條件之間使用OR，它將帶回錯誤的結果。 我需要在某個地方使用Parens使其工作嗎？

謝謝！

Answer 1

如果每個變量都可以為NULL，則不確定我是否完全遵循：

WHERE (c.name = @Cat OR @Cat IS NULL) 
  AND ((dt.name = @docType OR @docType IS NULL)  
        OR (mv2.value = @IdNo OR @IdNo IS NULL)) 

或空白：

WHERE (c.name = @Cat OR @Cat = '') 
  AND ((dt.name = @docType OR @docType = '')  
        OR (mv2.value = @IdNo OR @IdNo = ''))