Oracle常用查看表结构命令
以下内容转自:http://blog.csdn.net/xiaoyuncc/article/details/70859391
Oracle常用查看表结构命令
1、获取表:
- 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
2、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';
- <span style="color:#ff0000;">
- </span>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
3、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。
4、获取字段注释:
- select * from user_col_comments
- user_col_comments:table_name,column_name,comments