Oracle日常使用心得及sql语句

--创建表空间
CREATE TABLESPACE MDM   
DATAFILE 'C:/oracle1/product/10.2.0/oradata/dataissued/MDM.dbf'   
SIZE 2048M AUTOEXTEND ON NEXT 5M MAXSIZE 4096M; 
--删除表空间
DROP TABLESPACE MDM INCLUDING CONTENTS AND DATAFILES;
--索引表空间  
CREATE TABLESPACE MDM DATAFILE 'F:\tablespace\MDM' SIZE 2048M AUTOEXTEND ON NEXT 5M MAXSIZE 4096M;         
--创建用户并指定表空间
CREATE USER MDM IDENTIFIED BY dataissued DEFAULT TABLESPACE MDM --用户名 MDM 密码 dataissued
--修改用户密码
ALTER USER MDM IDENTIFIED BY mdm
--分配权限给新创建的用户
GRANT CONNECT,RESOURCE,DBA TO MDM
--对表进行分配extent
ALTER TABLE TABELNAME ALLOCATE EXTENT
--查询没有分配extent的表
SELECT * FROM USER_TABLES WHERE TABLE_NAME NOT IN (SELECT SEGMENT_NAME FROM USER_SEGMENTS WHERE SEGMENT_TYPE = 'TABLE')
--ip导出方式： 
exp demo/demo@127.0.0.1:1521/orcl file=f:/f.dmp full=y  
exp demo/demo@orcl file=f:/f.dmp full=y  
imp demo/demo@orcl file=f:/f.dmp full=y ignore=y  
imp MDM/dataissued@dataissued file=c:/mdm.dmp fromuser=mdm touser=MDM
--查看表空间情况
SELECT * FROM DBA_FREE_SPACE;
SELECT * FROM DBA_DATA_FILES
--Oracle用户解锁
ALTER USER mdm ACCOUNT UNLOCK;

--DBA命令
--管理员链接数据库
conn /as sysdba
--停止数据库
shutdown immediate
--启动数据库
startup
--显示用户
show user
--切换用户
conn system/password



--执行oracle存储过程
DECLARE O_RETURN VARCHAR2(200);
BEGIN
  p_mdm_updt_cstr(O_RETURN);
END p_mdm_updt_cstr;
--查看数据库执行了哪些sql
select last_active_time, SQL_FULLTEXT, SQL_TEXT from v$sql k where k.module='JDBC Thin Client'  and k.parsing_schema_name='ROEEE' order by k.last_active_time desc 
--对比两张表中所有字段的异同
SELECT ID, ALL_NGHT_IDNY, COUNT(*) FROM (
  SELECT ID, ALL_NGHT_IDNY FROM ZMYX_NEW_CSTR_HZ M
  UNION ALL
  SELECT ID, ALL_NGHT_IDNY FROM CSTR Y) 
  GROUP BY ID, ALL_NGHT_IDNY HAVING COUNT(*) =1 ORDER BY ID