unknow:静态注册

ready或blocked：动态注册

a、如果先启动监听，后启动数据库
Service "PLSExtProc" has 1 instance(s).
? Instance "PLSExtProc", status UNKNOWN, has 1 handler(s) for this service...
Service "orcl" has 2 instance(s).
??Instance "ORCL", status UNKNOWN, has 1 handler(s) for this service...
? Instance "orcl", status READY, has 1 handler(s) for this service...
Service "orclXDB" has 1 instance(s).
? Instance "orcl", status READY, has 1 handler(s) for this service...
The command completed successfully

从显示信息可以看出这种情况下既有动态注册又有静态注册

?(Service "PLSExtProc" 是在 listener.ora 文件中为数据库实例缺省配置的，允许PL/SQL包访问外部程序；
??? Service "orcl" 也是在 listener.ora 文件中配置，是每个数据库连接使用的标准模式；
??? Service "orclXDB" 是Oracle 9i以后版本创建数据库时默认包含的XML DB特性，提供http、ftp等服务，在初始化文spfile（或pfile）中定义)

b、重启监听

Service "PLSExtProc" has 1 instance(s).
? Instance "PLSExtProc", status UNKNOWN, has 1 handler(s) for this service..
Service "orcl" has 1 instance(s).
??Instance "ORCL", status UNKNOWN, has 1 handler(s) for this service...
Service "orcl1" has 1 instance(s).
? Instance "ORCL", status UNKNOWN, has 1 handler(s) for this service...
The command completed successfully

从显示信息可以看出这种情况下动态注册监听失败

c、删除listener.ora,重启监听

Listening Endpoints Summary...
? (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=MICROSOF-3033D5)(PORT=1521)))
The listener supports no services
The command completed successfully

从显示信息可以看出这种情况下动态注册监听和静态注册监听都失败

等待片刻（1min）。。。。