SQL - 從連接表

我已經填充一個空表（TAB_A）與來自TAB_B隨機記錄（5％）萃取隨機樣本，加入了與其它3個表（C1，C2，C3）。SQL - 從連接表

現在，如果我運行下面的查詢一切正常：

INSERT INTO TAB_A (field1,field2) 
    SELECT TAB_B.ID_TASS, TAB_B.ID_SEZ 
    FROM (SELECT TAB_B.*, row_number() 
      OVER (ORDER BY dbms_random.VALUE) r 
      FROM TAB_B) 
    WHERE r < (SELECT COUNT(*) FROM TAB_B)*0.05

的問題是，我也需要填寫其值在TAB_C3的TAB_A.field3。所以我重寫我前面的查詢：

INSERT INTO TAB_A (field1,field2,field3) 
    SELECT B.ID_TASS, B.ID_SEZ, C3.Z_ID 
    FROM (SELECT B.*, row_number() 
      OVER (ORDER BY dbms_random.VALUE) r 
      FROM TAB_B B 
       JOIN TAB_C1 C1 on C1.X_ID = B.X_ID 
       JOIN TAB_C2 C2 on C2.Y_ID = C1.Y_ID 
       JOIN TAB_C3 C3 on C3.Z_ID = C2.Z_ID 
      WHERE C3.Z_ID = 9) 
    WHERE r < (SELECT COUNT(*) FROM B)*0.05

但出現錯誤：ORA-00904：「C3.Z_ID」無效的標識符。

我想問題可能是在聲明中「SELECT B.ID_TASS，B.ID_SEZ，C3.Z_ID」，我在改變「SELECT TAB_B.ID_TASS，TAB_B.ID_SEZ，TAB_C3.Z_ID」 ....但沒有成功：再次發生相同的錯誤。

順便說一句，下面的查詢工作perfectely：

select count(*) 
    from TAB_B B 
     JOIN TAB_C1 C1 on C1.X_ID = B.X_ID 
     JOIN TAB_C2 C2 on C2.Y_ID = C1.Y_ID 
     JOIN TAB_C3 C3 on C3.Z_ID = C2.Z_ID 
    WHERE C3.Z_ID = 9

任何人可以幫助我嗎？

來源

2011-10-19 albus2011

如果你擔心性能，你可能要考慮使用示例：http://download.oracle.com/docs/cd/E11882_01/server.112/e26088/statements_10002 .htm＃i2065953 –

嘗試

...

SELECT B.ID_TASS，B.ID_SEZ，C3_Z_ID

FROM（SELECT * B.，C3.Z_ID AS C3_Z_ID， ROW_NUMBER（） ...

來源

2011-10-19 10:02:10 schurik

嘗試過，但沒有成功：相同的錯誤，但在不同的字段ORA-00904：「B.ID_SEZ」無效標識符。所以我改寫：SELECT TASS_ID，SEZ_ID，C3_Z_ID FROM（SELECT B.ID_TASS爲TASS_ID，B.SEZIONE_NUM爲SEZ_ID，C3.Z_ID AS C3_Z_ID，ROW_NUMBER（）...但出現新的錯誤：ORA-00942表或視圖不存在 – albus2011

@ albus2011：然後嘗試改變WHERE r <（SELECT COUNT（*）FROM B）* 0.05 to WHERE r <（SELECT COUNT（*）FROM ** TAB_B **）* 0.05 – schurik

done，但現在錯誤是ORA-00001唯一約束違反 – albus2011

以下應該工作，雖然我沒有測試過

INSERT INTO TAB_A (field1,field2,field3) 
>  SELECT intTab.ID_TASS, intTab.ID_SEZ, intTab.Z_ID 
>  FROM (SELECT B.*, c3.z_id,row_number() 
>    OVER (ORDER BY dbms_random.VALUE) r 
>    FROM TAB_B B 
>     JOIN TAB_C1 C1 on C1.X_ID = B.X_ID 
>     JOIN TAB_C2 C2 on C2.Y_ID = C1.Y_ID 
>     JOIN TAB_C3 C3 on C3.Z_ID = C2.Z_ID 
>    WHERE C3.Z_ID = 9) intTab 
>  WHERE intTab.r < (SELECT COUNT(*) FROM B)*0.05

來源

2011-10-19 11:02:07 josephj1989

'@ josephj1989 - 錯誤ORA-009 04：「intTab.Z_ID」無效標識符 – albus2011

SQL - 從連接表

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