plsql登陆时无数据库选项
安装了：
64位Oracle 11g R2 DB product安装地址 D:\Learning\Oracle\product
32位Oracle 11g Client product安装地址 D:\Learning\Oracle\win32_11g__Client\product
plsql development 9
按照网上的步骤下载了 instantclient_11_2压缩文件，解压到了D:\Learning\Oracle。
未登录状态下在plsql工具-首选项进行了以下配置：
也添加了环境变量
1、
2、这个ORACLE_HOME地址我写的64位Oracle 11g R2 DB的地址 我也不知道是否正确
3、
启动了以下的服务：
登陆的时候依然没有出来数据库：
在网上搜说D:\Learning\Oracle\product\NETWORK\ADMIN\tnsnames.ora有什么关系，本人菜鸟实在看不懂，求大神指教。
# This file contains the syntax information for
# the entries to be put in any tnsnames.ora file
# The entries in this file are need based.
# There are no defaults for entries in this file
# that Sqlnet/Net3 use that need to be overridden
#
# Typically you could have two tnsnames.ora files
# in the system, one that is set for the entire system
# and is called the system tnsnames.ora file, and a
# second file that is used by each user locally so that
# he can override the definitions dictated by the system
# tnsnames.ora file.
# The entries in tnsnames.ora are an alternative to using
# the names server with the onames adapter.
# They are a collection of aliases for the addresses that
# the listener(s) is(are) listening for a database or
# several databases.
# The following is the general syntax for any entry in
# a tnsnames.ora file. There could be several such entries
# tailored to the user's needs.
# one or more descriptions
# If there is just one description, unnecessary ]
(DESCRIPTION=
[ (SDU=2048) ] # Optional, defaults to 2048
# Can take values between 512 and 32K
[ (ADDRESS_LIST= # Optional depending on whether u have
# one or more addresses
# If there is just one address, unnecessary ]
(ADDRESS=
[ (COMMUNITY=
(PROTOCOL=tcp)
(HOST=
(PORT=
)
[ (ADDRESS=
(PROTOCOL=ipc)
(KEY=
)
]
[ (ADDRESS=
[ (COMMUNITY=
(PROTOCOL=decnet)
(NODE=
(OBJECT=
)
]