특정 테이블 스키마 조사
select col.table_name, com.comments, col.column_name, col.data_type, col.data_length, col.nullable
from user_tab_columns col, user_col_comments com
where col.TABLE_NAME = com.table_name
and col.COLUMN_NAME = com.column_name
and col.TABLE_NAME = 'SAFEDBTEST1'
order by col.table_name asc, col.column_id
모든 테이블 스키마 조사
select a.table_name
, a.column_name
,a.column_name
,a.comments,a.*,b.*
from user_col_comments a , user_tab_columns b
where a.table_name = b.table_name
and a.column_name = b.column_name
order by 1,2;
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