用於多個匹配的SQL邏輯

Question

我有一種情況，即從多個表MEMBERS，SS和SSUSED撤回數據。其中'MEMBERS'是成員數據表，'SS'是成員在其賬戶上購買的產品表，SSUSED是存儲產品使用情況的表格。產品可以有1,6或12個用途。所以可以有一對一，一對六或者一對一的比例。當我運行我的查詢時，我正在回收所有的用法。我只需要帶回最新的（SSUSED.usedate）。

我也試圖過濾出某些產品和產品類別，似乎並不完全正常工作。我在這裏和那裏得到一個隨機產品，我似乎無法隔離該問題。我認爲這可能是因爲我的邏輯不是以一種乾淨有效的方式編寫的。

CODE：

SELECT DISTINCT 
    MEMBERS.scancode, MEMBERS.lname, MEMBERS.fname, MEMBERS.mtypeid, MEMBERS.status, MEMBERS.lastvisit, MEMBERS.datejoin, 
    PRODUCTS.description, EMPLOYEES.lname AS EmpLname, EMPLOYEES.fname AS EmpFName, SSUSED.transactiontype, SS.initialdate, SS.initialquantity, 
    SS.usedquantity, MEMBERTYPES.mtype, SS.ssid, SSUSED.usedate 
FROM PRODUCTCATS INNER JOIN 
    PRODUCTS ON PRODUCTCATS.productcatid = PRODUCTS.productcatid INNER JOIN 
    SS ON PRODUCTS.productid = SS.productid INNER JOIN 
    MEMBERS ON SS.memid = MEMBERS.memid LEFT OUTER JOIN 
    SSUSED ON SS.ssid = SSUSED.ssid INNER JOIN 
    EMPLOYEES ON SSUSED.employeeid = EMPLOYEES.employeeid INNER JOIN 
    MEMBERTYPES ON MEMBERS.mtypeid = MEMBERTYPES.mtypeid 
WHERE  (SS.memid IN 
         (SELECT DISTINCT SS_1.memid 
         FROM   SS AS SS_1 INNER JOIN 
                SSUSED AS SSUSED_1 ON SS_1.ssid = SSUSED_1.ssid INNER JOIN 
                MEMBERS AS MEMBERS_1 ON SS_1.memid = MEMBERS_1.memid 
         WHERE  (MEMBERS_1.siteid = @rvSite) AND (SS_1.productid = '324' OR 
                SS_1.productid = '326') AND (SSUSED_1.usedate BETWEEN @rvStartDate AND @rvEndDate) AND (SSUSED_1.transactiontype = 'Use'))) AND 
        (PRODUCTS.productcatid = '27' OR 
        PRODUCTS.productcatid = '28' OR 
        PRODUCTS.productcatid = '29' OR 
        PRODUCTS.productcatid = '58' OR 
        PRODUCTS.productcatid = '77' OR 
        PRODUCTS.productcatid = '75' OR 
        PRODUCTS.productcatid = '30' OR 
        PRODUCTS.productcatid = '61' OR 
        PRODUCTS.productcatid = '31' OR 
        PRODUCTS.productcatid = '32' OR 
        PRODUCTS.productcatid = '47' OR 
        PRODUCTS.productcatid = '68') AND (SS.productid <> '32' OR 
        SS.productid <> '335' OR 
        SS.productid <> '350' OR 
        SS.productid <> '618' OR 
        SS.productid <> '1312' OR 
        SS.productid <> '1646' OR 
        SS.productid <> '54987' OR 
        SS.productid <> '55937' OR 
        SS.productid <> '58289' OR 
        SS.productid <> '58876' OR 
        SS.productid <> '601691') AND (SSUSED.transactiontype = 'Use' OR 
        SSUSED.transactiontype = 'Expired') AND (SSUSED.usedate >= @rvStartDate) 

Answer 1

這並沒有真正回答這個問題，但說明了這一點查詢多少可以清潔與一些格式，別名和轉換那些巨大的名單到謂詞。

SELECT DISTINCT m.scancode 
    , m.lname 
    , m.fname 
    , m.mtypeid 
    , m.STATUS 
    , m.lastvisit 
    , m.datejoin 
    , p.description 
    , e.lname AS EmpLname 
    , e.fname AS EmpFName 
    , su.transactiontype 
    , SS.initialdate 
    , SS.initialquantity 
    , SS.usedquantity 
    , mt.mtype 
    , SS.ssid 
    , su.usedate 
FROM PRODUCTCATS pc 
INNER JOIN PRODUCTS p ON pc.productcatid = p.productcatid 
INNER JOIN SS ON p.productid = SS.productid 
INNER JOIN MEMBERS m ON SS.memid = m.memid 
LEFT JOIN SSUSED su ON SS.ssid = su.ssid 
INNER JOIN EMPLOYEES e ON su.employeeid = e.employeeid 
INNER JOIN MEMBERTYPES mt ON m.mtypeid = mt.mtypeid 
WHERE SS.memid IN 
    (
     SELECT DISTINCT SS_1.memid 
     FROM SS AS SS_1 
     INNER JOIN SSUSED AS SSUSED_1 ON SS_1.ssid = SSUSED_1.ssid 
     INNER JOIN MEMBERS AS MEMBERS_1 ON SS_1.memid = MEMBERS_1.memid 
     WHERE MEMBERS_1.siteid = @rvSite 
      AND SS_1.productid in ('324', '326') 
      AND SSUSED_1.usedate BETWEEN @rvStartDate AND @rvEndDate 
      AND SSUSED_1.transactiontype = 'Use' 
    ) 
    AND p.productcatid in('27', '28', '29', '58', '77', '75', '30', '61', '31', '32', '47', '68') 
    AND SS.productid in ('32', '335', '350', '618', '1312', '1646', '54987', '55937', '58289', '58876', '601691') 
    AND su.transactiontype in ('Use', 'Expired' 
    AND su.usedate >= @rvStartDate 

真正能夠幫助我們需要的是什麼，這是應該做的一些認識，什麼是不工作的問題。