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Oracle 在PL-SQL中预期的位置未找到From关键字

oracle plsql

Oracle 在PL-SQL中预期的位置未找到From关键字,oracle,plsql,Oracle,Plsql,我有以下代码： v_SQL := ' -- ========================================================== -- Main Unpivot Table - To move years from column headings -- to rows values -- ========================================================== SELECT CAST(FieldYear AS

我有以下代码：

v_SQL := '
-- ==========================================================
--  Main Unpivot Table -  To move years from column headings 
--  to rows values
-- ==========================================================

SELECT 
CAST(FieldYear AS Number) FieldYear
, FieldType
, CASE FieldValue 
WHEN '''' THEN NULL
ELSE CAST (FieldValue AS Number(38,8))
END FieldValue
FROM 
(SELECT ' || 
v_InsertType ||' AS FieldType
,Y1 as ' || CAST(v_FY0 - 5 - v_OffSet AS CHAR) || '
,Y2 as ' || CAST(v_FY0 - 4 - v_OffSet AS CHAR) || '
,Y3 as ' || CAST(v_FY0 - 3 - v_OffSet AS CHAR) || '
,Y4 as ' || CAST(v_FY0 - 2 - v_OffSet AS CHAR) || '
,Y5 as ' || CAST(v_FY0 - 1 - v_OffSet AS CHAR) || '
,Y6 as ' || CAST(v_FY0     - v_OffSet AS CHAR) || ' 
,Y7 as ' || CAST(v_FY0 + 1 - v_OffSet AS CHAR) || '
,Y8 as ' || CAST(v_FY0 + 2 - v_OffSet AS CHAR) || '
,Y9 as ' || CAST(v_FY0 + 3 - v_OffSet AS CHAR) || '
,Y10 as ' || CAST(v_FY0 + 4 - v_OffSet AS CHAR) || '
,Y11 as ' || CAST(v_FY0 + 5 - v_OffSet AS CHAR) || '
,Y12 as ' || CAST(v_FY0 + 6 - v_OffSet AS CHAR) || '
,Y13 as ' || CAST(v_FY0 + 7 - v_OffSet AS CHAR) || '
,Y14 as ' || CAST(v_FY0 + 8 - v_OffSet AS CHAR) || '
,Y15 as ' || CAST(v_FY0 + 9 - v_OffSet AS CHAR) || '
,Y16 as ' || CAST(v_FY0 + 10 - v_OffSet AS CHAR) || '
,Y17 as ' || CAST(v_FY0 + 11 - v_OffSet AS CHAR) || '
,Y18 as ' || CAST(v_FY0 + 12 - v_OffSet AS CHAR) || '
,Y19 as ' || CAST(v_FY0 + 13 - v_OffSet AS CHAR) || '
,Y20 as ' || CAST(v_FY0 + 14 - v_OffSet AS CHAR) || '
,Y21 as ' || CAST(v_FY0 + 15 - v_OffSet AS CHAR) || '
,Y22 as ' || CAST(v_FY0 + 16 - v_OffSet AS CHAR) || '
,Y23 as ' || CAST(v_FY0 + 17 - v_OffSet AS CHAR) || '
,Y24 as ' || CAST(v_FY0 + 18 - v_OffSet AS CHAR) || '
,Y25 as ' || CAST(v_FY0 + 19 - v_OffSet AS CHAR) || '
,Y26 as ' || CAST(v_FY0 + 20 - v_OffSet AS CHAR) || '
,Y27 as ' || CAST(v_FY0 + 21 - v_OffSet AS CHAR) || '
,Y28 as ' || CAST(v_FY0 + 22 - v_OffSet AS CHAR) || '
,Y29 as ' || CAST(v_FY0 + 23 - v_OffSet AS CHAR) || '
,Y30 as ' || CAST(v_FY0 + 24 - v_OffSet AS CHAR) || '
,Y31 as ' || CAST(v_FY0 + 25 - v_OffSet AS CHAR) || '
,Y32 as ' || CAST(v_FY0 + 26 - v_OffSet AS CHAR) || '
,Y33 as ' || CAST(v_FY0 + 27 - v_OffSet AS CHAR) || '
,Y34 as ' || CAST(v_FY0 + 28 - v_OffSet AS CHAR) || '
,Y35 as ' || CAST(v_FY0 + 29 - v_OffSet AS CHAR) || '

FROM ' || 
v_tblInsertType || ') UP
UNPIVOT
(FieldValue FOR FieldYear IN 
(' || CAST(v_FY0 - 5 - v_OffSet AS CHAR) || '
,' || CAST(v_FY0 - 4 - v_OffSet AS CHAR) || '
,' || CAST(v_FY0 - 3 - v_OffSet AS CHAR) || '
,' || CAST(v_FY0 - 2 - v_OffSet AS CHAR) || '
,' || CAST(v_FY0 - 1 - v_OffSet AS CHAR) || '
,' || CAST(v_FY0     - v_OffSet AS CHAR) || '
,' || CAST(v_FY0 + 1 - v_OffSet AS CHAR) || '
,' || CAST(v_FY0 + 2 - v_OffSet AS CHAR) || '
,' || CAST(v_FY0 + 3 - v_OffSet AS CHAR) || '
,' || CAST(v_FY0 + 4 - v_OffSet AS CHAR) || '
,' || CAST(v_FY0 + 5 - v_OffSet AS CHAR) || '
,' || CAST(v_FY0 + 6 - v_OffSet AS CHAR) || '
,' || CAST(v_FY0 + 7 - v_OffSet AS CHAR) || '
,' || CAST(v_FY0 + 8 - v_OffSet AS CHAR) || '
,' || CAST(v_FY0 + 9 - v_OffSet AS CHAR) || '
,' || CAST(v_FY0 + 10 - v_OffSet AS CHAR) || '
,' || CAST(v_FY0 + 11 - v_OffSet AS CHAR) || '
,' || CAST(v_FY0 + 12 - v_OffSet AS CHAR) || '
,' || CAST(v_FY0 + 13 - v_OffSet AS CHAR) || '
,' || CAST(v_FY0 + 14 - v_OffSet AS CHAR) || '
,' || CAST(v_FY0 + 15 - v_OffSet AS CHAR) || '
,' || CAST(v_FY0 + 16 - v_OffSet AS CHAR) || '
,' || CAST(v_FY0 + 17 - v_OffSet AS CHAR) || '
,' || CAST(v_FY0 + 18 - v_OffSet AS CHAR) || '
,' || CAST(v_FY0 + 19 - v_OffSet AS CHAR) || '
,' || CAST(v_FY0 + 20 - v_OffSet AS CHAR) || '
,' || CAST(v_FY0 + 21 - v_OffSet AS CHAR) || '
,' || CAST(v_FY0 + 22 - v_OffSet AS CHAR) || '
,' || CAST(v_FY0 + 23 - v_OffSet AS CHAR) || '
,' || CAST(v_FY0 + 24 - v_OffSet AS CHAR) || '
,' || CAST(v_FY0 + 25 - v_OffSet AS CHAR) || '
,' || CAST(v_FY0 + 26 - v_OffSet AS CHAR) || '
,' || CAST(v_FY0 + 27 - v_OffSet AS CHAR) || '
,' || CAST(v_FY0 + 28 - v_OffSet AS CHAR) || '
,' || CAST(v_FY0 + 29 - v_OffSet AS CHAR) || '
)
)AS unpvt

Execute immediate v_SQL;
式中，v_FY0为数字（10）；v_SQL NVarchar2（4000），v_InsertType VARCHAR2（4000）；和v_偏移编号（10）；v_tblInsertType VARCHAR2（4000）

执行时，我得到：v_FY0=2018，v_OffSet=0

执行时，我得到错误-ORA-00923:FROM关键字未在预期位置找到

如何解决此问题以及如何使其正常工作。

您不能在
from
子句中使用
as

此查询：

select * from (select dummy from dual) as tab
产生错误
ORA-00933
。因此，只需将
删除为
：


select * from (select dummy from dual) tab



不能在
from
子句中使用
as

此查询：


select * from (select dummy from dual) as tab


产生错误
ORA-00933
。因此，只需将
删除为
：


select * from (select dummy from dual) tab



下面是修改后的代码，它为我提供了所需的答案：


v_SQL := '
-- ==========================================================
--  Main Unpivot Table -  To move years from column headings 
--  to rows values
-- ==========================================================

SELECT 
     CAST(FieldYear AS Number) FieldYear
    , FieldType
    , CASE FieldValue 
        WHEN n'''' THEN NULL
        ELSE CAST (FieldValue AS Number(38,8))
      END FieldValue
FROM 
   (SELECT ' || 
    v_InsertType ||' AS FieldType
    ,Y1 as "' || CAST(v_FY0 - 5 - v_OffSet AS CHAR) || '"
    ,Y2 as "' || CAST(v_FY0 - 4 - v_OffSet AS CHAR) || '"
    ,Y3 as "' || CAST(v_FY0 - 3 - v_OffSet AS CHAR) || '"
    ,Y4 as "' || CAST(v_FY0 - 2 - v_OffSet AS CHAR) || '"
    ,Y5 as "' || CAST(v_FY0 - 1 - v_OffSet AS CHAR) || '"
    ,Y6 as "' || CAST(v_FY0     - v_OffSet AS CHAR) || '"
    ,Y7 as "' || CAST(v_FY0 + 1 - v_OffSet AS CHAR) || '"
    ,Y8 as "' || CAST(v_FY0 + 2 - v_OffSet AS CHAR) || '"
    ,Y9 as "' || CAST(v_FY0 + 3 - v_OffSet AS CHAR) || '"
    ,Y10 as "' || CAST(v_FY0 + 4 - v_OffSet AS CHAR) || '"
    ,Y11 as "' || CAST(v_FY0 + 5 - v_OffSet AS CHAR) || '"
    ,Y12 as "' || CAST(v_FY0 + 6 - v_OffSet AS CHAR) || '"
    ,Y13 as "' || CAST(v_FY0 + 7 - v_OffSet AS CHAR) || '"
    ,Y14 as "' || CAST(v_FY0 + 8 - v_OffSet AS CHAR) || '"
    ,Y15 as "' || CAST(v_FY0 + 9 - v_OffSet AS CHAR) || '"
    ,Y16 as "' || CAST(v_FY0 + 10 - v_OffSet AS CHAR) || '"
    ,Y17 as "' || CAST(v_FY0 + 11 - v_OffSet AS CHAR) || '"
    ,Y18 as "' || CAST(v_FY0 + 12 - v_OffSet AS CHAR) || '"
    ,Y19 as "' || CAST(v_FY0 + 13 - v_OffSet AS CHAR) || '"
    ,Y20 as "' || CAST(v_FY0 + 14 - v_OffSet AS CHAR) || '"
    ,Y21 as "' || CAST(v_FY0 + 15 - v_OffSet AS CHAR) || '"
    ,Y22 as "' || CAST(v_FY0 + 16 - v_OffSet AS CHAR) || '"
    ,Y23 as  "' || CAST(v_FY0 + 17 - v_OffSet AS CHAR) || '"
    ,Y24 as "' || CAST(v_FY0 + 18 - v_OffSet AS CHAR) || '"
    ,Y25 as "' || CAST(v_FY0 + 19 - v_OffSet AS CHAR) || '"
    ,Y26 as "' || CAST(v_FY0 + 20 - v_OffSet AS CHAR) || '"
    ,Y27 as "' || CAST(v_FY0 + 21 - v_OffSet AS CHAR) || '"
    ,Y28 as "' || CAST(v_FY0 + 22 - v_OffSet AS CHAR) || '"
    ,Y29 as "' || CAST(v_FY0 + 23 - v_OffSet AS CHAR) || '"
    ,Y30 as "' || CAST(v_FY0 + 24 - v_OffSet AS CHAR) || '"
    ,Y31 as "' || CAST(v_FY0 + 25 - v_OffSet AS CHAR) || '"
    ,Y32 as "' || CAST(v_FY0 + 26 - v_OffSet AS CHAR) || '"
    ,Y33 as "' || CAST(v_FY0 + 27 - v_OffSet AS CHAR) || '"
    ,Y34 as "' || CAST(v_FY0 + 28 - v_OffSet AS CHAR) || '"
    ,Y35 as "' || CAST(v_FY0 + 29 - v_OffSet AS CHAR) || '"

  FROM ' || 
        v_tblInsertType || ') UP
UNPIVOT
   (FieldValue FOR FieldYear IN 
    ("' || CAST(v_FY0 - 5 - v_OffSet AS CHAR) || '"
    ,"' || CAST(v_FY0 - 4 - v_OffSet AS CHAR) || '"
    ,"' || CAST(v_FY0 - 3 - v_OffSet AS CHAR) || '"
    ,"' || CAST(v_FY0 - 2 - v_OffSet AS CHAR) || '"
    ,"' || CAST(v_FY0 - 1 - v_OffSet AS CHAR) || '"
    ,"' || CAST(v_FY0     - v_OffSet AS CHAR) || '"
    ,"' || CAST(v_FY0 + 1 - v_OffSet AS CHAR) || '"
    ,"' || CAST(v_FY0 + 2 - v_OffSet AS CHAR) || '"
    ,"' || CAST(v_FY0 + 3 - v_OffSet AS CHAR) || '"
    ,"' || CAST(v_FY0 + 4 - v_OffSet AS CHAR) || '"
    ,"' || CAST(v_FY0 + 5 - v_OffSet AS CHAR) || '"
    ,"' || CAST(v_FY0 + 6 - v_OffSet AS CHAR) || '"
    ,"' || CAST(v_FY0 + 7 - v_OffSet AS CHAR) || '"
    ,"' || CAST(v_FY0 + 8 - v_OffSet AS CHAR) || '"
    ,"' || CAST(v_FY0 + 9 - v_OffSet AS CHAR) || '"
    ,"' || CAST(v_FY0 + 10 - v_OffSet AS CHAR) || '"
    ,"' || CAST(v_FY0 + 11 - v_OffSet AS CHAR) || '"
    ,"' || CAST(v_FY0 + 12 - v_OffSet AS CHAR) || '"
    ,"' || CAST(v_FY0 + 13 - v_OffSet AS CHAR) || '"
    ,"' || CAST(v_FY0 + 14 - v_OffSet AS CHAR) || '"
    ,"' || CAST(v_FY0 + 15 - v_OffSet AS CHAR) || '"
    ,"' || CAST(v_FY0 + 16 - v_OffSet AS CHAR) || '"
    ,"' || CAST(v_FY0 + 17 - v_OffSet AS CHAR) || '"
    ,"' || CAST(v_FY0 + 18 - v_OffSet AS CHAR) || '"
    ,"' || CAST(v_FY0 + 19 - v_OffSet AS CHAR) || '"
    ,"' || CAST(v_FY0 + 20 - v_OffSet AS CHAR) || '"
    ,"' || CAST(v_FY0 + 21 - v_OffSet AS CHAR) || '"
    ,"' || CAST(v_FY0 + 22 - v_OffSet AS CHAR) || '"
    ,"' || CAST(v_FY0 + 23 - v_OffSet AS CHAR) || '"
    ,"' || CAST(v_FY0 + 24 - v_OffSet AS CHAR) || '"
    ,"' || CAST(v_FY0 + 25 - v_OffSet AS CHAR) || '"
    ,"' || CAST(v_FY0 + 26 - v_OffSet AS CHAR) || '"
    ,"' || CAST(v_FY0 + 27 - v_OffSet AS CHAR) || '"
    ,"' || CAST(v_FY0 + 28 - v_OffSet AS CHAR) || '"
    ,"' || CAST(v_FY0 + 29 - v_OffSet AS CHAR) || '"
)
) unpvt' ;

Execute immediate v_SQL;



下面是修改后的代码，它为我提供了所需的答案：


v_SQL := '
-- ==========================================================
--  Main Unpivot Table -  To move years from column headings 
--  to rows values
-- ==========================================================

SELECT 
     CAST(FieldYear AS Number) FieldYear
    , FieldType
    , CASE FieldValue 
        WHEN n'''' THEN NULL
        ELSE CAST (FieldValue AS Number(38,8))
      END FieldValue
FROM 
   (SELECT ' || 
    v_InsertType ||' AS FieldType
    ,Y1 as "' || CAST(v_FY0 - 5 - v_OffSet AS CHAR) || '"
    ,Y2 as "' || CAST(v_FY0 - 4 - v_OffSet AS CHAR) || '"
    ,Y3 as "' || CAST(v_FY0 - 3 - v_OffSet AS CHAR) || '"
    ,Y4 as "' || CAST(v_FY0 - 2 - v_OffSet AS CHAR) || '"
    ,Y5 as "' || CAST(v_FY0 - 1 - v_OffSet AS CHAR) || '"
    ,Y6 as "' || CAST(v_FY0     - v_OffSet AS CHAR) || '"
    ,Y7 as "' || CAST(v_FY0 + 1 - v_OffSet AS CHAR) || '"
    ,Y8 as "' || CAST(v_FY0 + 2 - v_OffSet AS CHAR) || '"
    ,Y9 as "' || CAST(v_FY0 + 3 - v_OffSet AS CHAR) || '"
    ,Y10 as "' || CAST(v_FY0 + 4 - v_OffSet AS CHAR) || '"
    ,Y11 as "' || CAST(v_FY0 + 5 - v_OffSet AS CHAR) || '"
    ,Y12 as "' || CAST(v_FY0 + 6 - v_OffSet AS CHAR) || '"
    ,Y13 as "' || CAST(v_FY0 + 7 - v_OffSet AS CHAR) || '"
    ,Y14 as "' || CAST(v_FY0 + 8 - v_OffSet AS CHAR) || '"
    ,Y15 as "' || CAST(v_FY0 + 9 - v_OffSet AS CHAR) || '"
    ,Y16 as "' || CAST(v_FY0 + 10 - v_OffSet AS CHAR) || '"
    ,Y17 as "' || CAST(v_FY0 + 11 - v_OffSet AS CHAR) || '"
    ,Y18 as "' || CAST(v_FY0 + 12 - v_OffSet AS CHAR) || '"
    ,Y19 as "' || CAST(v_FY0 + 13 - v_OffSet AS CHAR) || '"
    ,Y20 as "' || CAST(v_FY0 + 14 - v_OffSet AS CHAR) || '"
    ,Y21 as "' || CAST(v_FY0 + 15 - v_OffSet AS CHAR) || '"
    ,Y22 as "' || CAST(v_FY0 + 16 - v_OffSet AS CHAR) || '"
    ,Y23 as  "' || CAST(v_FY0 + 17 - v_OffSet AS CHAR) || '"
    ,Y24 as "' || CAST(v_FY0 + 18 - v_OffSet AS CHAR) || '"
    ,Y25 as "' || CAST(v_FY0 + 19 - v_OffSet AS CHAR) || '"
    ,Y26 as "' || CAST(v_FY0 + 20 - v_OffSet AS CHAR) || '"
    ,Y27 as "' || CAST(v_FY0 + 21 - v_OffSet AS CHAR) || '"
    ,Y28 as "' || CAST(v_FY0 + 22 - v_OffSet AS CHAR) || '"
    ,Y29 as "' || CAST(v_FY0 + 23 - v_OffSet AS CHAR) || '"
    ,Y30 as "' || CAST(v_FY0 + 24 - v_OffSet AS CHAR) || '"
    ,Y31 as "' || CAST(v_FY0 + 25 - v_OffSet AS CHAR) || '"
    ,Y32 as "' || CAST(v_FY0 + 26 - v_OffSet AS CHAR) || '"
    ,Y33 as "' || CAST(v_FY0 + 27 - v_OffSet AS CHAR) || '"
    ,Y34 as "' || CAST(v_FY0 + 28 - v_OffSet AS CHAR) || '"
    ,Y35 as "' || CAST(v_FY0 + 29 - v_OffSet AS CHAR) || '"

  FROM ' || 
        v_tblInsertType || ') UP
UNPIVOT
   (FieldValue FOR FieldYear IN 
    ("' || CAST(v_FY0 - 5 - v_OffSet AS CHAR) || '"
    ,"' || CAST(v_FY0 - 4 - v_OffSet AS CHAR) || '"
    ,"' || CAST(v_FY0 - 3 - v_OffSet AS CHAR) || '"
    ,"' || CAST(v_FY0 - 2 - v_OffSet AS CHAR) || '"
    ,"' || CAST(v_FY0 - 1 - v_OffSet AS CHAR) || '"
    ,"' || CAST(v_FY0     - v_OffSet AS CHAR) || '"
    ,"' || CAST(v_FY0 + 1 - v_OffSet AS CHAR) || '"
    ,"' || CAST(v_FY0 + 2 - v_OffSet AS CHAR) || '"
    ,"' || CAST(v_FY0 + 3 - v_OffSet AS CHAR) || '"
    ,"' || CAST(v_FY0 + 4 - v_OffSet AS CHAR) || '"
    ,"' || CAST(v_FY0 + 5 - v_OffSet AS CHAR) || '"
    ,"' || CAST(v_FY0 + 6 - v_OffSet AS CHAR) || '"
    ,"' || CAST(v_FY0 + 7 - v_OffSet AS CHAR) || '"
    ,"' || CAST(v_FY0 + 8 - v_OffSet AS CHAR) || '"
    ,"' || CAST(v_FY0 + 9 - v_OffSet AS CHAR) || '"
    ,"' || CAST(v_FY0 + 10 - v_OffSet AS CHAR) || '"
    ,"' || CAST(v_FY0 + 11 - v_OffSet AS CHAR) || '"
    ,"' || CAST(v_FY0 + 12 - v_OffSet AS CHAR) || '"
    ,"' || CAST(v_FY0 + 13 - v_OffSet AS CHAR) || '"
    ,"' || CAST(v_FY0 + 14 - v_OffSet AS CHAR) || '"
    ,"' || CAST(v_FY0 + 15 - v_OffSet AS CHAR) || '"
    ,"' || CAST(v_FY0 + 16 - v_OffSet AS CHAR) || '"
    ,"' || CAST(v_FY0 + 17 - v_OffSet AS CHAR) || '"
    ,"' || CAST(v_FY0 + 18 - v_OffSet AS CHAR) || '"
    ,"' || CAST(v_FY0 + 19 - v_OffSet AS CHAR) || '"
    ,"' || CAST(v_FY0 + 20 - v_OffSet AS CHAR) || '"
    ,"' || CAST(v_FY0 + 21 - v_OffSet AS CHAR) || '"
    ,"' || CAST(v_FY0 + 22 - v_OffSet AS CHAR) || '"
    ,"' || CAST(v_FY0 + 23 - v_OffSet AS CHAR) || '"
    ,"' || CAST(v_FY0 + 24 - v_OffSet AS CHAR) || '"
    ,"' || CAST(v_FY0 + 25 - v_OffSet AS CHAR) || '"
    ,"' || CAST(v_FY0 + 26 - v_OffSet AS CHAR) || '"
    ,"' || CAST(v_FY0 + 27 - v_OffSet AS CHAR) || '"
    ,"' || CAST(v_FY0 + 28 - v_OffSet AS CHAR) || '"
    ,"' || CAST(v_FY0 + 29 - v_OffSet AS CHAR) || '"
)
) unpvt' ;

Execute immediate v_SQL;



为什么不尝试通过dbms_output.put_行输出
v_sql
变量的结果？这样您就可以看到创建的查询是什么，并且应该能够更容易地发现问题。请尝试将
）作为unpvt
更改为
）unpvt
。将
删除为
@Pounderstibbons-这实际上是答案（而不仅仅是一条评论）。不妨将其作为答案发布。顺便说一下
立即执行v_SQL对于select查询没有用处，除非您将结果存储在某个地方。它不会返回任何结果。如果您使用的是12c及以上版本，
DBMS\u SQL.RETURN\u RESULT
对于动态光标可能很有用。为什么不尝试通过DBMS\u output.put\u行输出
v\u SQL
变量的结果？然后您可以看到创建的查询是什么，您应该能够更容易地发现问题。请尝试将
）更改为unpvt
，以
）unpvt
。将
删除为
@Pounderstibbons-这实际上是答案（而不仅仅是一条评论）。不妨将其作为答案发布。顺便说一下
立即执行v_SQL对于select查询没有用处，除非您将结果存储在某个地方。它不会返回任何结果。如果您使用的是12c及以上版本，
DBMS\u SQL.RETURN\u RESULT
对于动态游标可能很有用。