Oracle错误 - ORA-00907：缺少右括号

Question

我正在为这个Oracle错误挠头。以下查询完美：

SELECT 
    V.PROJECTID, 
    (SELECT WM_CONCAT(DISTINCT NAME) 
    FROM TPM_TRAININGPLAN JOIN TPM_DELIVERYMETHODS USING (METHODID) 
    WHERE PROJECTID=V.PROJECTID 
    AND VERSIONID=V.VERSIONID) as Methods 
FROM TPM_PROJECTVERSION V 

但是，我想按字母顺序返回我的concantonated列表，因为我很挑剔。你以为我会做：

SELECT 
    V.PROJECTID, 
    (SELECT WM_CONCAT(DISTINCT NAME) 
    FROM TPM_TRAININGPLAN JOIN TPM_DELIVERYMETHODS USING (METHODID) 
    WHERE PROJECTID=V.PROJECTID 
    AND VERSIONID=V.VERSIONID ORDER BY NAME) as Methods 
FROM TPM_PROJECTVERSION V 

然而，当我尝试这个，我得到的错误：

[Error] Script lines: 15-19 ------------------------ 
ORA-00907: missing right parenthesis 

我可以在自己的SELECT语句运行查询，像这样：

SELECT WM_CONCAT(DISTINCT NAME) 
FROM TPM_TRAININGPLAN JOIN TPM_DELIVERYMETHODS USING (METHODID) 
WHERE PROJECTID=240 
AND VERSIONID=1 
ORDER BY NAME 

它运行良好。我的括号比太阳马戏团队伍更加平衡。为什么错误？

Answer 1

我觉得聚集WM_CONCAT功能不受ORDER BY。

因此，如承诺的那样，对结果进行排序的自定义聚合。也可以在早期版本中使用。现在

-- A string table type to hold the values to concat. I limited it to 4000 because 
-- of trouble with the driver I use. You should be able to change it to 32767, or 
-- whatever is VARCHAR2's max size. 
CREATE OR REPLACE TYPE TT_STRING as table of varchar2(4000); 

-- An aggregate type for the concatenation. It uses the string table to 
-- hold all values, and sorts it when you're done aggregating. 
CREATE OR REPLACE TYPE AT_CONCATSORTED as object 
(
    V_ITEMS TT_STRING, 

    static function ODCIAggregateInitialize(
    P_CONTEXT in out AT_CONCATSORTED) 
    return number, 

    member function ODCIAggregateIterate(
    self in out AT_CONCATSORTED, 
    P_VALUE in  varchar2) 
    return number, 

    member function ODCIAggregateTerminate(
    self  in AT_CONCATSORTED, 
    P_RESULT out varchar2, 
    P_FLAGS in number) 
    return number, 

    member function ODCIAggregateMerge(
    self  in out AT_CONCATSORTED, 
    P_CONTEXT in  AT_CONCATSORTED) 
    return number 
); 


create or replace type body AT_CONCATSORTED is 

static function ODCIAggregateInitialize(
    P_CONTEXT in out AT_CONCATSORTED) 
return number 
is 
begin 
    if P_CONTEXT is null then 
    P_CONTEXT := AT_CONCATSORTED(TT_STRING('')); 
    else 
    P_CONTEXT.V_ITEMS.delete; 
    end if; 

    return ODCIConst.Success; 
end; 

member function ODCIAggregateIterate(
    self in out AT_CONCATSORTED, 
    P_VALUE in  varchar2) 
return number 
is 
begin 
    self.V_ITEMS.extend; 
    self.V_ITEMS(self.V_ITEMS.last) := P_VALUE; 

    return ODCIConst.Success; 
end; 

member function ODCIAggregateTerminate(
    self  in AT_CONCATSORTED, 
    P_RESULT out varchar2, 
    P_FLAGS in number) 
return number 
is 
    V_SORTEDITEMS TT_STRING; 
begin 
    select 
    cast(multiset(select 
        * 
        from 
        table(self.V_ITEMS) 
        order by 
        1) as TT_STRING) 
    into 
    V_SORTEDITEMS 
    from 
    dual; 

    for i in V_SORTEDITEMS.first..V_SORTEDITEMS.last loop 
    P_RESULT := P_RESULT || V_SORTEDITEMS(i); 
    if i < V_SORTEDITEMS.last - 1 then 
     P_RESULT := P_RESULT || ', '; 
    end if; 
    end loop; 

    return ODCIConst.Success; 
end; 

member function ODCIAggregateMerge(
    self  in out AT_CONCATSORTED, 
    P_CONTEXT in  AT_CONCATSORTED) 
return number 
is 
begin 
    for i in P_CONTEXT.V_ITEMS.first..P_CONTEXT.V_ITEMS.last loop 
    self.V_ITEMS.extend; 
    self.V_ITEMS(self.V_ITEMS.last) := P_CONTEXT.V_ITEMS(i); 
    end loop; 

    return ODCIConst.Success; 
end; 

end; 

-- The actual concat function 
create or replace function CONCATSORTED (input varchar2) return varchar2 
aggregate using AT_CONCATSORTED; 

您的查询可以是这个样子：

SELECT 
    V.PROJECTID, 
    CONCATSORTED(DISTINCT NAME) as NAMES 
FROM 
    TPM_TRAININGPLAN JOIN TPM_DELIVERYMETHODS USING (METHODID) 
WHERE 
    PROJECTID=V.PROJECTID 
    AND VERSIONID=V.VERSIONID) as Methods 
FROM 
    TPM_PROJECTVERSION V 

Answer 2

尝试

SELECT 
    V.PROJECTID,Methods.met 
FROM 
    (SELECT WM_CONCAT(DISTINCT NAME)as met 
    FROM TPM_TRAININGPLAN JOIN TPM_DELIVERYMETHODS USING (METHODID) 
    WHERE PROJECTID=V.PROJECTID AND VERSIONID=V.VERSIONID ORDER BY NAME) 
as Methods,TPM_PROJECTVERSION V 

但我认为你应该添加一个WHERE子句用于连接两个表....