Oracle查询表及注释

1.1查询所有的表及表注释

1）查询当前用户对应的表

select table_name from user_tables;

2）查询表和注释

select table_name,comments from user_tab_comments

1.2查询所有的列及列注释

1）查询表对应的列及字段类型

select table_name,column_name,data_type,data_length from user_tab_columns where table_name='SYS_USER';

2）查询表对应的列及注释

select t1.column_name,t1.data_type,t1.data_length,t2.comments
from user_tab_columns t1
left join user_col_comments t2 on t1.table_name = t2.table_name and t1.column_name=t2.column_name
where t1.table_name='SYS_USER';