可能簡化SQL？

此查詢的目的是爲「相同」類型的項目的四種不同變體計算每個唯一ID（LUID_NO）。它按預期工作。
現在我的問題，這個查詢可以簡化或以另一種方式寫？
當我看到它時，我無法動搖這種感覺，即可能用另一種更簡單的方式來書寫它。可能簡化SQL？

SELECT 
    (SELECT COUNT(DISTINCT ICL.LUID_NO) 
      FROM  L2000.ITEM_CARRIER IC 
      INNER JOIN L2000.ITEM_UNITS_DEFINITION IUD ON IUD.PV_ID=IC.PV_ID AND IUD.STORER_ID=IC.STORER_ID AND IUD.ITEM_ID=IC.ITEM_ID 
      INNER JOIN L2000.ITEM_CARRIER_LUID ICL ON ICL.ITEM_CARRIER_NO=IC.ITEM_CARRIER_NO 
      INNER JOIN L2000.ITEM_PROPERTY IP ON IC.PROPERTY_INDEX=IP.PROPERTY_INDEX 
      INNER JOIN L2000.ITEM I ON I.ITEM_ID = IC.ITEM_ID AND I.STORER_ID = IC.STORER_ID 
        WHERE  IC.PV_ID = 'B2' 
        AND  IP.BLOCK_CODE IS NULL 
        AND  IUD.UOM_QTY = ICL.PHYSIC_QTY 
        AND  IUD.UNIT_DEF_ID = 'LU' 
        AND  IC.STORER_ID = 'PG' 
        AND  ICL.PHYSIC_QTY > 0 
        AND  I.ITEM_DESC LIKE '#%' 
        AND  I.ITEM_GROUP_ID IN ('BABYCARE','FEMCARE') 
    )AS B2_PALLETS, 
    (SELECT COUNT(DISTINCT ICL.LUID_NO) 
      FROM  L2000.ITEM_CARRIER IC 
      INNER JOIN L2000.ITEM_UNITS_DEFINITION IUD ON IUD.PV_ID=IC.PV_ID AND IUD.STORER_ID=IC.STORER_ID AND IUD.ITEM_ID=IC.ITEM_ID 
      INNER JOIN L2000.ITEM_CARRIER_LUID ICL ON ICL.ITEM_CARRIER_NO=IC.ITEM_CARRIER_NO 
      INNER JOIN L2000.ITEM_PROPERTY IP ON IC.PROPERTY_INDEX=IP.PROPERTY_INDEX 
      INNER JOIN L2000.ITEM I ON I.ITEM_ID = IC.ITEM_ID AND I.STORER_ID = IC.STORER_ID 
        WHERE IC.PV_ID = 'B3' 
        AND  IP.BLOCK_CODE IS NULL 
        AND  IUD.UOM_QTY = ICL.PHYSIC_QTY 
        AND  IUD.UNIT_DEF_ID = 'LU' 
        AND  IC.STORER_ID = 'PG' 
        AND  ICL.PHYSIC_QTY > 0 
        AND  I.ITEM_DESC LIKE '#%' 
        AND  I.ITEM_GROUP_ID IN ('BABYCARE','FEMCARE') 
    )AS B3_PALLETS, 
    (SELECT COUNT(DISTINCT ICL.LUID_NO) 
      FROM  L2000.ITEM_CARRIER IC 
      INNER JOIN L2000.ITEM_UNITS_DEFINITION IUD ON IUD.PV_ID=IC.PV_ID AND IUD.STORER_ID=IC.STORER_ID AND IUD.ITEM_ID=IC.ITEM_ID 
      INNER JOIN L2000.ITEM_CARRIER_LUID ICL ON ICL.ITEM_CARRIER_NO=IC.ITEM_CARRIER_NO 
      INNER JOIN L2000.ITEM_PROPERTY IP ON IC.PROPERTY_INDEX=IP.PROPERTY_INDEX 
      INNER JOIN L2000.ITEM I ON I.ITEM_ID = IC.ITEM_ID AND I.STORER_ID = IC.STORER_ID 
        WHERE IC.PV_ID = 'B2' 
        AND  IP.BLOCK_CODE IS NOT NULL 
        AND  IUD.UNIT_DEF_ID = 'LU' 
        AND  IC.STORER_ID = 'PG' 
        AND  ICL.PHYSIC_QTY > 0 
        AND  I.ITEM_DESC LIKE '#%' 
        AND  I.ITEM_GROUP_ID IN ('BABYCARE','FEMCARE') 
    )AS BLOCKED_B2_PALLETS, 
    (SELECT COUNT(DISTINCT ICL.LUID_NO) 
      FROM  L2000.ITEM_CARRIER IC 
      INNER JOIN L2000.ITEM_UNITS_DEFINITION IUD ON IUD.PV_ID=IC.PV_ID AND IUD.STORER_ID=IC.STORER_ID AND IUD.ITEM_ID=IC.ITEM_ID 
      INNER JOIN L2000.ITEM_CARRIER_LUID ICL ON ICL.ITEM_CARRIER_NO=IC.ITEM_CARRIER_NO 
      INNER JOIN L2000.ITEM_PROPERTY IP ON IC.PROPERTY_INDEX=IP.PROPERTY_INDEX 
      INNER JOIN L2000.ITEM I ON I.ITEM_ID = IC.ITEM_ID AND I.STORER_ID = IC.STORER_ID 
        WHERE IC.PV_ID = 'B3' 
        AND  IP.BLOCK_CODE IS NOT NULL 
        AND  IUD.UNIT_DEF_ID = 'LU' 
        AND  IC.STORER_ID = 'PG' 
        AND  ICL.PHYSIC_QTY > 0 
        AND  I.ITEM_DESC LIKE '#%' 
        AND  I.ITEM_GROUP_ID IN ('BABYCARE','FEMCARE') 
    )AS BLOCKED_B3_PALLETS 

FROM L2000.ITEM_CARRIER 
WHERE ROWNUM = 1

來源

2017-10-10 Christoffer Trabjerg

跳過子查詢，做左連接代替。並使用大小寫表達式來進行條件聚合。 – jarlh

您的子查詢與主查詢無關，因此，您可以將'FROM D000'開始，而不是'FROM L2000.ITEM_CARRIER WHERE ROWNUM = 1'。 –

您可以在'ITEM_ID'上加入'ITEM'和'ITEM_CARRIER'和'ITEM_UNITS_DEFINITION'。爲什麼不'ITEM_PROPERTY'呢？那張桌子沒有「ITEM_ID」嗎？如果你展示並解釋表格是如何相關的，這將有所幫助。例如，什麼是「PV_ID」？ –

使用條件聚集

SELECT COUNT(DISTINCT CASE WHEN IC.PV_ID = 'B2' 
       AND  IP.BLOCK_CODE IS NULL THEN ICL.LUID_NO END) AS B2_PALLETS, 
     COUNT(DISTINCT CASE WHEN IC.PV_ID = 'B3' 
       AND  IP.BLOCK_CODE IS NULL THEN ICL.LUID_NO END) AS B3_PALLETS, 
     COUNT(DISTINCT CASE WHEN IC.PV_ID = 'B2' 
       AND  IP.BLOCK_CODE IS NOT NULL THEN ICL.LUID_NO END) AS BLOCKED_B2_PALLETS, 
     COUNT(DISTINCT CASE WHEN IC.PV_ID = 'B3' 
       AND  IP.BLOCK_CODE IS NOT NULL THEN ICL.LUID_NO END) AS BLOCKED_B3_PALLETS 
     FROM  L2000.ITEM_CARRIER IC 
     INNER JOIN L2000.ITEM_UNITS_DEFINITION IUD ON IUD.PV_ID=IC.PV_ID AND IUD.STORER_ID=IC.STORER_ID AND IUD.ITEM_ID=IC.ITEM_ID 
     INNER JOIN L2000.ITEM_CARRIER_LUID ICL ON ICL.ITEM_CARRIER_NO=IC.ITEM_CARRIER_NO 
     INNER JOIN L2000.ITEM_PROPERTY IP ON IC.PROPERTY_INDEX=IP.PROPERTY_INDEX 
     INNER JOIN L2000.ITEM I ON I.ITEM_ID = IC.ITEM_ID AND I.STORER_ID = IC.STORER_ID 
       WHERE IUD.UOM_QTY = ICL.PHYSIC_QTY 
       AND  IUD.UNIT_DEF_ID = 'LU' 
       AND  IC.STORER_ID = 'PG' 
       AND  ICL.PHYSIC_QTY > 0 
       AND  I.ITEM_DESC LIKE '#%' 
       AND  I.ITEM_GROUP_ID IN ('BABYCARE','FEMCARE')

來源

2017-10-10 07:05:28

這看起來是正確的，但我確實得到了一個「缺失的表達式」。似乎無法找到錯誤，我想是一個額外的逗號或類似的東西？ –

@ChristofferTrabjerg我有一個額外的逗號。現在就試試。 –

工作很好，我也找到了逗號。謝謝！！ –

可能簡化SQL？

回答

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