plsql 登錄后提示：
Database character set (AL32UTF8) and Client character set (ZHS16GBK) are different.
Character set conversion may cause unexpected results.
Note: you can set the client character set through the NLS_LANG environment variable or the NLS_LANG registry key in
HKEY_LOCAL_MACHINE\SOFTWARE\Oracle\KEY_OraClient11g_home2.
解決辦法：修改注冊表
打開注冊表,‘開始’-‘運行’ 輸入‘regedit’-確定。
找到提示中給出的路徑，
(在win10 64位系統中，按照提示並不能找到路徑，網上百度了下,64位系統和32位系統不一樣，最終的答案是)
HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Oracle\KEY_OraClient11g_home2.
找到 NLS_LANG 鍵，他的值原來是：SIMPLIFIED CHINESE_CHINA.ZHS16GBK
修改為：SIMPLIFIED CHINESE_CHINA.AL32UTF8
重新打開plsql ，登錄，好了。