-4
我不是DBA,因此提出这个问题。有人可以告诉我什么是下面提到的查询的意义:oracle对所有者的唯一索引
select i.index_name,
NVL(c.column_name,' '),
NVL(c.DESCEND, 'ASC')
from all_indexes i, all_ind_columns c
where i.index_name = c.index_name
and (i.INDEX_TYPE = 'NORMAL' or i.INDEX_TYPE = 'FUNCTION-BASED NORMAL')
and i.table_name = name
and i.owner = c.index_owner
and i.table_owner = owner
and c.table_name = name
and c.table_owner = owner
and i.uniqueness = 'UNIQUE'
order by c.index_name, c.column_position
这是一种关于索引的约束检查。请分享你的想法。