Oracle查看表结构命令

 

select table_name from user_tables; //当前用户的表       

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
posted @ 2017-11-07 12:03  gxwzwyq  阅读(8393)  评论(0编辑  收藏  举报