Oracle 常用语句SQL

 

查询Oracle 用户下面的所有表,表注释,行数

select t.TABLE_NAME, s.comments,t.NUM_ROWS
  from user_tables t, user_tab_comments s
 where t.TABLE_NAME = s.table_name(+)
   and t.NUM_ROWS > 0 order by t.TABLE_NAME;

 

查询某个用户下所有的存储过程/触发器/函数

 

select *  from all_source where type='PROCEDURE' AND owner='SAJET';

 

获取表字段:
select * 
from user_tab_columns 
where Table_Name='用户表' 
order by column_name
获取表注释:
select * 
from user_tab_comments 
where Table_Name='用户表'
order by Table_Name
获取字段注释:
select * 
from user_col_comments 
where Table_Name='用户表'
order by column_name

/* 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='zfxfzb'
/* 
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。 
*/

 

 

posted @ 2017-11-10 17:02  nieweiking  阅读(255)  评论(0编辑  收藏  举报