Tool/SQL to find index that should be unique

Hello,

i found out that our erp software uses a lot of index but looks like everywhere theres is only one unique.

But i guess all indexes that contain all fields of the unique index should also be unique.

Otherwise oracle cant use them optimal, right?

Example:

INDEX_OWNER	INDEX_NAME	UNIQUENESS	STATUS	INDEX_TYPE	TEMPORARY	PARTITIONED	FUNCIDX_STATUS	JOIN_INDEX	COLUMNS
TEST_ERP_001	PK_DOK	UNIQUE	VALID	NORMAL	N	NO		NO	DOKART, DOKNR
TEST_ERP_001	I_DOK101	NONUNIQUE	VALID	NORMAL	N	NO		NO	KADRNR, DOKART, DRKDEF
TEST_ERP_001	I_DOK102	NONUNIQUE	VALID	NORMAL	N	NO		NO	VADRNR, DOKART, DRKDEF