Question

我无法弄清楚导致它的问题是什么。我已经尝试重命名“金额”我试图改变传输的数据类型，我尝试删除它，但后来它说，一旦我这样做，End_Date无效。这是代码。

INSERT INTO price
( price_id
, item_id
, price_type
, active_flag
, start_date
, end_date
, amount
, created_by
, creation_date
, last_updated_by
, last_updated)

(SELECT price_s1.nextval
,      il.Item_ID
,      il.Price_Type
,      il.Active_Flag
,      il.Start_Date
,      il.End_Date
,      il.amount
,      1
,      SYSDATE
,      1
,      SYSDATE 
FROM    (SELECT i.item_id AS "Item_ID"
        , af.active_flag AS "Active_Flag"
        , cl.common_lookup_id AS "Price_Type"
        , cl.common_lookup_type AS "Price_Desc"
        ,    CASE    
             WHEN (TRUNC(SYSDATE) - 30) > TRUNC(i.release_date) THEN TRUNC(i.release_date) + 31
             ELSE TRUNC(i.release_date)
             END AS "Start_Date"
        ,    CASE
             WHEN (TRUNC(SYSDATE)-30) > TRUNC(i.release_date) AND active_flag = 'N' THEN
             TRUNC(i.release_date) + 30
             ELSE   
                null
             END AS "End_Date"
        ,    CASE
                 WHEN active_flag = 'N' AND cl.common_lookup_type = '1-DAY RENTAL' THEN 3
                 WHEN active_flag = 'N' AND cl.common_lookup_type = '3-DAY RENTAL' THEN 10
                 WHEN active_flag = 'N' AND cl.common_lookup_type = '5-DAY RENTAL' THEN 15
                 WHEN i.release_date+1 > (SYSDATE-1) AND cl.common_lookup_type = '1-DAY RENTAL' THEN 3
                 WHEN i.release_date+1 > (SYSDATE-1) AND cl.common_lookup_type = '3-DAY RENTAL' THEN 10
                 WHEN i.release_date+1 > (SYSDATE-1) AND cl.common_lookup_type = '5-DAY RENTAL' THEN 15
                 WHEN active_flag = 'Y' AND i.release_date +1 < (SYSDATE-1) THEN cl.common_lookup_code
             END AS "amount"

             FROM     item i CROSS JOIN
                (SELECT 'Y' AS active_flag FROM dual
                 UNION ALL
                 SELECT 'N' AS active_flag FROM dual) af CROSS JOIN
                (SELECT '1' AS rental_days FROM dual
                 UNION ALL
                 SELECT '3' AS rental_days FROM dual
                 UNION ALL
                 SELECT '5' AS rental_days FROM dual) dr INNER JOIN
                 common_lookup cl ON dr.rental_days = SUBSTR(cl.common_lookup_type,1,1)
        WHERE    cl.common_lookup_table = 'PRICE'
        AND      cl.common_lookup_column = 'PRICE_TYPE'
        AND NOT (active_flag ='N' AND (TRUNC(SYSDATE)-30) < TRUNC(i.release_date))
        ORDER BY 1, 2, 3) il);

我在

处收到错误

,      il.amount

这就是它所说的

Error report -
SQL Error: ORA-00904: "IL"."AMOUNT": invalid identifier
00904. 00000 -  "%s: invalid identifier"
*Cause:    
*Action:

任何帮助将不胜感激，如果您需要更多信息，请询问。感谢

Answer 1

通过使用别名的引号，您可以指定particalur区分大小写的名称。

CASE ... END AS "amount"

以小写形式指定别名为"amount"。如果要访问它，请使用相同的拼写。例如。 "Amount"无效。

您正在尝试访问

il.amount

并且因为没有引号，你说：＆＃34;我不关心大/小写＆＃34;。这在直接访问表名和列名时或使用不带引号的别名时有效。但是，在您之前使用"amount"之前，找不到amount（如果可能的话，你很幸运;我猜它可以与所有上层字符的别名一起发生，就像Oracle一样在内部使用上面的字符作为其名称，但你不想依赖它。

我建议你删除引号。尽可能避免使用它们。使用不带引号的名称（您实际上已经在做的名称;您的别名都不包含任何空白，前导数字或其他任何名称）。

Oracle无效标识符错误：ORA-00904在插入子查询中

1 个答案: