In Oracle
select CONNECYBY.SCHEMA_NAME,CONNECYBY.TABLE_NAME,CONNECYBY.INDEX_NAME,CONNECYBY.COLUMN_NAME
from ( select TABLE_OWNER SCHEMA_NAME,TABLE_NAME,INDEX_NAME,COLUMN_POSITION,trim(',' from sys_connect_by_path(COLUMN_NAME,',')) COLUMN_NAME
from DBA_IND_COLUMNS
start with COLUMN_POSITION = 1
connect by TABLE_OWNER = prior TABLE_OWNER
and TABLE_NAME = prior TABLE_NAME
and INDEX_NAME = prior INDEX_NAME
and COLUMN_POSITION = prior COLUMN_POSITION + 1) CONNECYBY
join ( select TABLE_OWNER SCHEMA_NAME,TABLE_NAME,INDEX_NAME,max(COLUMN_POSITION) COLUMN_POSITION
from DBA_IND_COLUMNS
group by TABLE_OWNER,TABLE_NAME,INDEX_NAME) MAX_CONNECYBY
on ( CONNECYBY.SCHEMA_NAME = MAX_CONNECYBY.SCHEMA_NAME
and CONNECYBY.TABLE_NAME = MAX_CONNECYBY.TABLE_NAME
and CONNECYBY.INDEX_NAME = MAX_CONNECYBY.INDEX_NAME
and CONNECYBY.COLUMN_POSITION = MAX_CONNECYBY.COLUMN_POSITION)
order by CONNECYBY.SCHEMA_NAME,CONNECYBY.TABLE_NAME,CONNECYBY.INDEX_NAME
In SQL Server mit
CONNECTBY(SCHEMA_NAME,TABLE_NAME,INDEX_NAME,INDEX_COLUMN_ID,COLUMN_NAME)
as
( select SCHEMAS.NAME SCHEMA_NAME
, TABLES.NAME TABLE_NAME
, INDEXES.NAME INDEX_NAME
, INDEX_COLUMNS.INDEX_COLUMN_ID INDEX_COLUMN_ID
, cast(COLUMNS.NAME AS VARCHAR(MAX)) COLUMN_NAME
from SYS.INDEXES
join SYS.TABLES on (INDEXES.OBJECT_ID = TABLES.OBJECT_ID)
join SYS.SCHEMAS on (TABLES.SCHEMA_ID = SCHEMAS.SCHEMA_ID)
join SYS.INDEX_COLUMNS on ( INDEXES.OBJECT_ID = INDEX_COLUMNS.OBJECT_ID
and INDEX_COLUMNS.INDEX_ID = INDEXES.INDEX_ID)
join SYS.COLUMNS on ( INDEXES.OBJECT_ID = COLUMNS.OBJECT_ID
and INDEX_COLUMNS.COLUMN_ID = COLUMNS.COLUMN_ID)
where INDEX_COLUMNS.INDEX_COLUMN_ID = 1
union all
select SCHEMAS.NAME SCHEMA_NAME
, TABLES.NAME TABLE_NAME
, INDEXES.NAME INDEX_NAME
, INDEX_COLUMNS.INDEX_COLUMN_ID INDEX_COLUMN_ID
, cast(PRIOR.COLUMN_NAME + ',' + COLUMNS.NAME AS VARCHAR(MAX)) COLUMN_NAME
from SYS.INDEXES
join SYS.TABLES on (INDEXES.OBJECT_ID = TABLES.OBJECT_ID)
join SYS.SCHEMAS on (TABLES.SCHEMA_ID = SCHEMAS.SCHEMA_ID)
join SYS.INDEX_COLUMNS on ( INDEXES.OBJECT_ID = INDEX_COLUMNS.OBJECT_ID
and INDEX_COLUMNS.INDEX_ID = INDEXES.INDEX_ID)
join SYS.COLUMNS on ( INDEXES.OBJECT_ID = COLUMNS.OBJECT_ID
and INDEX_COLUMNS.COLUMN_ID = COLUMNS.COLUMN_ID)
join CONNECTBY as PRIOR on (SCHEMAS.NAME = PRIOR.SCHEMA_NAME
and TABLES.NAME = PRIOR.TABLE_NAME
and INDEXES.NAME = PRIOR.INDEX_NAME
and INDEX_COLUMNS.INDEX_COLUMN_ID = PRIOR.INDEX_COLUMN_ID + 1))
select CONNECTBY.SCHEMA_NAME,CONNECTBY.TABLE_NAME,CONNECTBY.INDEX_NAME,CONNECTBY.COLUMN_NAME
from CONNECTBY
join ( select SCHEMA_NAME
, TABLE_NAME
, INDEX_NAME
, MAX(INDEX_COLUMN_ID) INDEX_COLUMN_ID
from CONNECTBY
group by SCHEMA_NAME,TABLE_NAME,INDEX_NAME) MAX_CONNECTBY
on (CONNECTBY.SCHEMA_NAME = MAX_CONNECTBY.SCHEMA_NAME
and CONNECTBY.TABLE_NAME = MAX_CONNECTBY.TABLE_NAME
and CONNECTBY.INDEX_NAME = MAX_CONNECTBY.INDEX_NAME
and CONNECTBY.INDEX_COLUMN_ID = MAX_CONNECTBY.INDEX_COLUMN_ID)
order by CONNECTBY.SCHEMA_NAME,CONNECTBY.TABLE_NAME,CONNECTBY.INDEX_NAME