Problem solving process:
1. Check whether sqlnet.ora (located in the %ORACLE_HOME%NETWORK/ADMIN directory under WINDOWS) contains this sentence: SQLNET.AUTHENTICATION_SERVICES=(NTS) After checking, the configuration file is OK
2. Check whether the user who logs in to Windows (administrator or the user used when installing oracle) is included in the ORA_DBA group. This phenomenon may occur when the domain user is not connected to the domain server.
A. Non-home edition Windows systems can directly manage users and groups
ERROR:ORA-01031:insufficient privileges perfect solution
no user group
win10 professional version solves no user group
B. The home version of the Windows system cannot find users and groups, and needs to use the Administration Assistant for Windows tool that comes with Oracle
1. Start-->Oracle11g-->Administration Assistant for Windows-->Oracle Managed Objects-->Computers-->Hostname-->Operating System Database Administrator-Computer
2. Then fill in the domain in the pop-up window: hostname Select the user to be added, add
connection test
Attach the Oracle entry installation tutorial
Installation and use of Oracle SQL*Plus _oscar999's column - CSDN blog _sqlplus installation