如何修复'ORA-00904：“Y”：无效标识符 00904。00000 -“%s：无效标识符”'？

Question

我正在尝试创建一个 SQL select 语句，该语句使用变量输入来确定 WHERE function 的运行方式。 代码遇到了意想不到的问题。

我试图更改条件的语法，以便他们使用 LIKE 代替，但问题仍然存在。 该变量肯定被保存，但它仍然给出错误。

SELECT (SELECT description FROM froomtype rt 
       WHERE rt.roomtypeid = rsd.roomtypeid),
       SUM(totalrevenue)
FROM froomservicedata rsd
WHERE (SELECT requestdate FROM froomservice rs WHERE rs.roomserviceid = rsd.roomserviceid) >
    (CASE
         WHEN UPPER(&&timeperiod) = 'D' THEN 
             sysdate - interval '24' hour  
         WHEN UPPER(&&timeperiod) = 'W' THEN 
             sysdate - interval '7' day  
         WHEN UPPER(&&timeperiod) = 'M' THEN 
             sysdate - interval '1' month   
         WHEN UPPER(&&timeperiod) = 'Y' THEN 
             sysdate - interval '1' year
         ELSE
            sysdate + 1
    END)
GROUP BY (SELECT description FROM froomtype rt WHERE rt.roomtypeid = rsd.roomtypeid);

这是错误消息：

ORA-00904: "Y": invalid identifier
00904. 00000 -  "%s: invalid identifier"

Answer 1

您缺少单引号。

您的查询应该是：

SELECT (SELECT description FROM froomtype rt 
       WHERE rt.roomtypeid = rsd.roomtypeid),
       SUM(totalrevenue)
FROM froomservicedata rsd
WHERE (SELECT requestdate FROM froomservice rs WHERE rs.roomserviceid = rsd.roomserviceid) >
    (CASE
         WHEN UPPER('&&timeperiod') = 'D' THEN 
             sysdate - interval '24' hour  
         WHEN UPPER('&&timeperiod') = 'W' THEN 
             sysdate - interval '7' day  
         WHEN UPPER('&&timeperiod') = 'M' THEN 
             sysdate - interval '1' month   
         WHEN UPPER('&&timeperiod') = 'Y' THEN 
             sysdate - interval '1' year
         ELSE
            sysdate + 1
    END)
GROUP BY (SELECT description FROM froomtype rt WHERE rt.roomtypeid = rsd.roomtypeid);

干杯！！