oracle学习笔记
1.oracle实例服务：oracleServiceXXX2.oracle监听服务：oracleoradb11g_home1TNSListener3.登录：sqlplus sys/sys as sysdba;4.显示表结构命令：desc tableName;5.查询所有用户名：select username,default_tablespace from dba_users;6.默认表空间：USERS,TEMP,SYSTEM,SYSAUX,UNDOTBS17.切换用户命令：CONNECT USE
