Oracle中查看所有表和字段以及表注释.字段注释

获取表:

select table_name from user_tables; //当前用户拥有的表     
select table_name from all_tables; //所有用户的表
select table_name from dba_tables; //包括系统表
select table_name from dba_tables where owner='用户名'

user_tables: table_name,tablespace_name,last_analyzed等

dba_tables: ower,table_name,tablespace_name,last_analyzed等

all_tables: ower,table_name,tablespace_name,last_analyzed等

all_objects: ower,object_name,subobject_name,object_id,created,last_ddl_time,timestamp,status等

 

获取表字段:

select * from user_tab_columns where Table_Name='用户表';

select * from all_tab_columns where Table_Name='用户表';

select * from dba_tab_columns where Table_Name='用户表';

 

user_tab_columns: table_name,column_name,data_type,data_length,data_precision,data_scale,nullable,column_id等 all_tab_columns : ower,table_name,column_name,data_type,data_length,data_precision,data_scale,nullable,column_id等 dba_tab_columns: ower,table_name,column_name,data_type,data_length,data_precision,data_scale,nullable,column_id等

 

获取表注释:

select * from user_tab_comments

user_tab_comments:table_name,table_type,comments 相应的还有dba_tab_comments,all_tab_comments,这两个比user_tab_comments多了ower列。

 

获取字段注释:

select * from user_col_comments

user_col_comments:table_name,column_name,comments
相应的还有dba_col_comments,all_col_comments,这两个比user_col_comments多了ower列。

 

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