1.查询表的备注信息
select t.* from all_tab_comments t
where t.TABLE_NAME like '%表名%'
and t.OWNER like '%数据库%'
2.查询列备注信息
SELECT
t.OWNER,t.TABLE_NAME,t.COLUMN_NAME,t.COMMENTS
FROM
ALL_COL_COMMENTS t
WHERE
TABLE_NAME like '%表名%'
3.列字段的相关信息
select t.OWNER,t.TABLE_NAME,t.COLUMN_NAME,t.DATA_TYPE,t.DATA_LENGTH, t.NULLABLE,t.COLUMN_ID
from all_tab_columns t
where table_name like '%表名%'
4.合并查询表结构
select
t.COLUMN_NAME,t.DATA_TYPE,t.DATA_LENGTH, t.NULLABLE,
tc.COMMENTS,t.COLUMN_ID,t.OWNER,t.TABLE_NAME
from all_tab_columns t, ALL_COL_COMMENTS tc
where t.table_name = 'SHXX'
and t.OWNER=tc.OWNER
and t.TABLE_NAME=tc.TABLE_NAME
and t.COLUMN_NAME=tc.COLUMN_NAME
order by t.COLUMN_ID asc
