CX_Oracle CTE執行

我在Oracle中構建了一個關係數據模型，現在使用Python創建了一個GUI。我需要一個SQL語句在我的IDE中執行，但得到一個cx_Oracle.DatabaseError: ORA-00936: missing expression錯誤消息。這是一個在TOAD中運行良好的CTE，當我刪除CTE並放入一個簡單的SQl語句時，它可以很好地執行。CX_Oracle CTE執行

我可以在我的數據庫中建立一個視圖並執行select * from但我不想這樣。

我是新來的Python，所以我確信有更好的方法來做到這一點。

import cx_Oracle 

con = cx_Oracle.connect('Example', 'Example', "Example") 
cur = con.cursor() 


statement = ("with r1 as (" + 
      " select " + 
      " r.PARENT_ITEM_id, " + 
      " D.SC_ID, " + 
      " --F.TONS" + 
      " SUM(ROUND(F.TONS*Pic_Distro*2000*s.stk_lvl_mult)) as Stocking_Lvl" + 
      " from PIC_DISTRO_TBL D" + 
      " Left Join Part_Velocity_TBL P on (P.item_ID = D.Item_ID and D.SC_ID = P.SC_ID)" + 
      " Left Join Forecast_TBL F on (D.Bucket_ID = F.Bucket_ID and D.SC_ID =F.SC_ID)" + 
      " left join Stock_lvl_tbl S on (S.Velocity_id = P.VELOCITY_ID)" + 
      " left join item_tbl I on (i.item_ID = D.ITEM_ID)" + 
      " left join parent_item_tbl R on (r.PARENT_ITEM_id = i.PARENT_ITEM_id)" + 
      "  Where F.MTH = '4'" + 
      "  and F.YEAR = '2017'" + 
      "  and P.Velocity_id in ('A','B','C')" + 
      "  and D.SC_ID in ('01','02')" + 
      "  -- and SUM(ROUND(F.TONS*Pic_Distro*2000*s.stk_lvl_mult)) > 0" + 
      "   Group by " + 
      "   r.PARENT_ITEM_id, D.SC_ID " + 
      "    Order by " + 
      "     D.SC_ID DESC, Stocking_lvl DESC" + 
      ")," + 
      "R2 as (" + 
      "select r.Parent_Item_ID, o.SC_ID, " + 
      "coalesce(sum(avail_wt), 0) as Avail_Wt" + 
      " from" + 
      " open_inv_tbl O" + 
      " left join item_tbl I on (i.item_ID = o.ITEM_ID)" + 
      " left join parent_item_tbl R on (r.PARENT_ITEM_id = i.PARENT_ITEM_id)" + 
      "  Where r.Parent_item_ID is not null" + 
      "  Group by r.Parent_Item_ID,o.SC_ID)" + 
      "select " + 
      " r1.PARENT_ITEM_id, " + 
      " R1.SC_ID, R1.Stocking_Lvl , " + 
      " coalesce(R2.Avail_wt, 0) as Avail_Wt, " + 
      " coalesce(R2.Avail_wt/R1.Stocking_Lvl, 0) as Precantage" + 
      " From R1" + 
      " left join R2 on (R1.parent_item_id = R2.parent_item_id and R1.Sc_ID = R2.Sc_ID) " + 
      "  Where R1.Stocking_lvl > '0' " + 
      "  Order by SC_id Desc, Stocking_Lvl Desc)") 

cur.arraysize = 2000 
cur.execute(statement)

來源

2017-04-26 Tom S

Python爲您提供多行字符串，當用三引號包裝時。嘗試執行一個字符串並檢查您的查詢是否正確。

statement = """ 
    with r1 as (
     select 
      r.PARENT_ITEM_id, 
      D.SC_ID, 
      --F.TONS 
     ... 
    """ 
cur.execute(statement)

來源

2017-04-26 12:34:22

用三引號包裝多行字符串解決了我的問題。謝謝。 –

CX_Oracle CTE執行

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