Sql 动态Oracle Pivot_In_子句
我有点困了。我想创建一个用户角色关系透视表,到目前为止,我的查询如下所示:Sql 动态Oracle Pivot_In_子句,sql,oracle,pivot,Sql,Oracle,Pivot,我有点困了。我想创建一个用户角色关系透视表,到目前为止,我的查询如下所示: WITH PIVOT_DATA AS ( SELECT * FROM ( SELECT USERNAME, GRANTED_ROLE FROM DBA_USERS@DB_LINK U LEFT OUTER JOIN DBA_ROLE_PRIVS@DB_LINK R ON U.USERNAME = R.GRANTEE ) ) S
WITH PIVOT_DATA AS (
SELECT *
FROM
(
SELECT USERNAME, GRANTED_ROLE
FROM DBA_USERS@DB_LINK U LEFT OUTER JOIN DBA_ROLE_PRIVS@DB_LINK R
ON U.USERNAME = R.GRANTEE
)
)
SELECT *
FROM PIVOT_DATA
PIVOT
(
COUNT(GRANTED_ROLE)
FOR GRANTED_ROLE
IN('CONNECT') -- Just an example
)
ORDER BY USERNAME ASC;
它工作得很好,很好,但是我不想写任何我想在pivot\u in\u子句中搜索的角色,因为我们有很多这样的角色,我不想每次都检查是否有任何更改
那么,有没有办法在pivot\u in_子句中编写SELECT
?我自己也试过:
[...]
PIVOT
(
COUNT(GRANTED_ROLE)
FOR GRANTED_ROLE
IN( SELECT ROLE FROM DBA_ROLES@DB_LINK )
)
[...]
但它总是在整个查询的第1行给我一个ORA-00936:“缺少表达式”,我不知道为什么。在pivot\u in\u子句中不能有SELECT
,或者我做错了吗?您可以在脚本中构建动态查询,
看看这个例子:
variable rr refcursor
declare
bb varchar2(4000);
cc varchar2( 30000 );
begin
WITH PIVOT_DATA AS (
SELECT *
FROM
(
SELECT USERNAME, GRANTED_ROLE
FROM DBA_USERS U LEFT OUTER JOIN DBA_ROLE_PRIVS R
ON U.USERNAME = R.GRANTEE
)
)
select ''''|| listagg( granted_role, ''',''' )
within group( order by granted_role ) || '''' as x
into bb
from (
select distinct granted_role from pivot_data
)
;
cc := q'[
WITH PIVOT_DATA AS (
SELECT *
FROM
(
SELECT USERNAME, GRANTED_ROLE
FROM DBA_USERS U LEFT OUTER JOIN DBA_ROLE_PRIVS R
ON U.USERNAME = R.GRANTEE
)
)
SELECT *
FROM PIVOT_DATA
PIVOT
(
COUNT(GRANTED_ROLE)
FOR GRANTED_ROLE
IN(]' || bb || q'[) -- Just an example
)
ORDER BY USERNAME ASC]';
open :rr for cc;
end;
/
SET PAGESIZE 200
SET LINESIZE 16000
print :rr
这是结果(只有一小部分,因为它很宽很长)
您的愿望的问题是结果的列数不可预测/可变。@FlorinGhita:是的,我必须在5个不同的数据库实例上运行此脚本,并且角色数不同。这就是为什么我想要这个脚本的“动态”版本。您可以使用PIVOT XML,然后使用(any)作为子句。缺点是,然后由客户机来解析xml。那正是我要找的。它确实做得很棒。:)
-----------------------------------------------------------------------------------------------------------------------------------
USERNAME 'ADM_PARALLEL_EXECUTE_TASK' 'APEX_ADMINISTRATOR_ROLE' 'AQ_ADMINISTRATOR_ROLE' 'AQ_USER_ROLE'
------------------------------ --------------------------- ------------------------- ----------------------- ----------------------
ANONYMOUS 0 0 0 0
APEX_030200 0 0 0 0
APEX_PUBLIC_USER 0 0 0 0
APPQOSSYS 0 0 0 0
..............
IX 0 0 1 1
OWBSYS 0 0 1 1