zoukankan      html  css  js  c++  java
  • 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。 
    */

     
  • 相关阅读:
    大厂前端带来css3动画transition的使用和介绍全新认识动画
    js事件冒泡和事件捕获详解
    css3动画讲解,关于css3的@keyframes和animation
    [bug] Hive:java.net.ConnectException: Connection refused
    [bug] Hive:User root is not allowed to impersonate anonymous
    [bug] Hive:Permission denied: user=anonymous, access=EXECUTE, inode=”/tmp”
    [bug] Hive:Error: FUNCTION 'NUCLEUS_ASCII' already exists. (state=X0Y68,code=30000)
    [Python] 环境
    [Java] Web
    [计算机科学] 编程语言
  • 原文地址:https://www.cnblogs.com/qq458978/p/7815517.html
Copyright © 2011-2022 走看看