SQL / ORACLE缺少關鍵字

Question

我正在處理一個sql文件，試圖制作一個腳本，該腳本可以帶回顯示的表中的所有數據或表中的所有數據以及3個月的數據。 我不斷收到錯誤消息，指出error 00905 missing keyword ，但我不明白為什么。

我看了看語法，對我來說一切都正確。 我將在出現錯誤的位置（在第一個內部聯接處）放置一個標記。 我更改了所有表名，以使它看起來更好，因為它已經超出了語法。

任何幫助都將非常感謝。 這只是代碼的一部分，但是我確定它必須在這里。

WHEN Table_typ_cde = '1' -- Pulling all data --
  THEN
    INNER JOIN  Table   acp ON Table_oid = Table_oid
    INNER JOIN  Table   loss ON Table_oid = Table_oid
    LEFT OUTER JOIN Table veh ON Table_oid = Table_oid and Table_nbr=1
    INNER JOIN Table   brnch ON Table_OID = Table_oid
    INNER JOIN Table   a ON Table_OID = Table_oid
    INNER JOIN Table   c Table_OID = Table_oid
    INNER JOIN Table   s ON Table_OID = Table_oid
    INNER JOIN Table   r ON Table_OID = Table_oid
    INNER JOIN Table   grp ON Table_oid = Table_oid
    INNER JOIN Table on Table_id = Table_id
    WHERE Table_ID <> 2
 WHEN Table_cde = '2' -- Pulling all data within the last 3 months along with all present data --
 THEN
    INNER JOIN  Table   acp ON Table_oid = Table_oid
    INNER JOIN  Table   loss ON Table_oid = Table_oid
    LEFT OUTER JOIN Table veh ON Table_oid = Table_oid and Table_nbr=1
    INNER JOIN Table   brnch ON Table_OID = Table_oid
    INNER JOIN Table   a ON Table_OID = Table_oid
    INNER JOIN Table   c ON Table_OID = Table_oid
    INNER JOIN Table   s ON Table_OID = Table_oid
    INNER JOIN Table   r ON Table_OID = Table_oid
    INNER JOIN Table   grp ON Table_oid = Table_oid
    INNER JOIN Table on Table_id = Table_id
    WHERE Table_ID <> 2
    AND df.DATE_CREATED BETWEEN ADD_MONTHS(SYSDATE, -6)
    AND sysdate
END                                         
) core

Answer 1

您不能使用CASE破壞JOIN 。 我已經在您的查詢中看到了這一點，

THEN
   INNER JOIN  Table   acp ON Table_oid = Table_oid
   INNER JOIN  Table   loss ON Table_oid = Table_oid

這是錯誤的，必須在INNER JOIN關鍵字之前提供表名。

Answer 2

您有兩組看起來相等的聯接。 然后，您有一個希望有條件應用的日期過濾器。 您需要在WHERE子句而不是FROM中應用它。 像這樣

FROM  ... INNER JOIN  Table   acp ON Table_oid = Table_oid
    INNER JOIN  Table   loss ON Table_oid = Table_oid
    LEFT OUTER JOIN Table veh ON Table_oid = Table_oid and Table_nbr=1
    INNER JOIN Table   brnch ON Table_OID = Table_oid
    INNER JOIN Table   a ON Table_OID = Table_oid
    INNER JOIN Table   c ON Table_OID = Table_oid
    INNER JOIN Table   s ON Table_OID = Table_oid
    INNER JOIN Table   r ON Table_OID = Table_oid
    INNER JOIN Table   grp ON Table_oid = Table_oid
    INNER JOIN Table on Table_id = Table_id
WHERE Table_ID <> 2
    AND (Table_cde = '1' 
          or ( Table_cde = '2' 
          and df.DATE_CREATED BETWEEN ADD_MONTHS(SYSDATE, -6) AND sysdate ))