查询表字段明细
select column_name,data_type,data_length,DATA_PRECISION ,DATA_SCALE
from all_tab_columns where table_name='tablename'
字段注释
select * from user_col_comments;
表注释
select * from user_tab_comments;
表明细+表注释+字段明细+字段注释
select ATC.OWNER,atC.TABLE_NAME,utc.comments,ATC.COLUMN_NAME,ATC.DATA_TYPE,ATC.DATA_LENGTH,ATC.NULLABLE, ucc.comments from
(select ATC.OWNER,atC.TABLE_NAME,ATC.COLUMN_NAME,ATC.DATA_TYPE,ATC.DATA_LENGTH,ATC.NULLABLE
from all_tab_columns ATC where ATC.owner in (用戶名1，用戶名2........) ) atc
left outer join user_col_comments ucc on atc.table_name=ucc.table_name and atc.column_name=ucc.column_name
left outer join user_tab_comments utc on atc.table_name=utc.table_name
order by atc.table_name,atc.column_name;
注意:oracle内部是区分字母大小写,否则查询结果将会返回空.
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