oracle查询

 

sqlplus username/password@//host:port/sid

打印出当前用户下所有表中的字段信息

SELECT t1.Table_Name AS "表名称",
t3.comments AS "表说明",
t1.Column_Name AS "字段名称",
t1.Data_Type AS "数据类型",
t1.Data_Length AS "长度",
t1.NullAble AS "是否为空",
t2.Comments AS "字段说明",
t1.Data_Default "默认值"
FROM cols t1 left join user_col_comments t2
on t1.Table_name=t2.Table_name and t1.Column_Name=t2.Column_Name
left join user_tab_comments t3
on t1.Table_name=t3.Table_name
WHERE NOT EXISTS ( SELECT t4.Object_Name FROM User_objects t4
WHERE t4.Object_Type='TABLE'
AND t4.Temporary='Y'
AND t4.Object_Name=t1.Table_Name )
ORDER BY t1.Table_Name, t1.Column_ID;

 

 

 

spool常用的设置 
set colsep' ';　　　 //域输出分隔符 
set echo off;　　　　//显示start启动的脚本中的每个sql命令，缺省为on 
set feedback off;　　//回显本次sql命令处理的记录条数，缺省为on 
set heading off;　　 //输出域标题，缺省为on 
set pagesize 0;　　　//输出每页行数，缺省为24,为了避免分页，可设定为0。 
set termout off;　　 //显示脚本中的命令的执行结果，缺省为on 
set trimout on;　　　//去除标准输出每行的拖尾空格，缺省为off 
set trimspool on;　　//去除重定向（spool）输出每行的拖尾空格，缺省为off 

 

set pagesize 0
set long 90000
set feedback off
set echo off
spool all_index.sql
SELECT DBMS_METADATA.GET_DDL('INDEX',u.index_name)
FROM USER_INDEXES u;
spool off;