Oracle經常使用查看錶結構命令

Oracle經常使用查看錶結構命令

 

獲取表： 

select table_name from user_tables; //當前用戶的表       

select table_name from all_tables; //全部用戶的表   

select table_name from dba_tables; //包括系統表 

select table_name from dba_tables where owner='用戶名' 

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 

獲取表字段： 

select * from user_tab_columns where Table_Name='用戶表'; 

select * from all_tab_columns where Table_Name='用戶表'; 

select * from dba_tab_columns where Table_Name='用戶表'; 

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 

獲取表註釋： 

select * from user_tab_comments 

user_tab_comments：table_name,table_type,comments 

--相應的還有dba_tab_comments，all_tab_comments，這兩個比user_tab_comments多了ower列。 

獲取字段註釋：  select * from user_col_comments  user_col_comments：table_name,column_name,comments