How to solve protocol adapter error in oracle 11g

Three methods: 1. Click on the program in Start, find the service option in the management tool, and start the "OracleOraDb11g_home1TNSlistener" service in the service panel; 2. Start "OracleServiceBOOKSALES" in the service; 3. Use regedit to enter "HKEY_LOCAL_MACHINESOFTWAREORACLEHOME", set "ORACLE_SID" to "database SID".

The operating environment of this tutorial: Windows 10 system, Oracle version 12c, Dell G3 computer.

How to solve the protocol adapter error in oracle 11g

　ORA-12560: TNS: Protocol adapter error solution

Causes the problem of ORA-12560: TNS: Protocol adapter error There are three reasons:

1. The monitoring service has not started.

The windows platform operates as follows: Start---Programs---Management Tools---Services, open the service panel,

Start the OracleOraDb11g_home1TNSlistener service.

# 2. The database instance does not start up.

Windows platform is as follows: Start---Programs---Management Tools---Services, open the service

panel, start OracleServiceBOOKSALES, BOOKSALES is your database SID　　

3. Registry problem.

regedit, and then enter HKEY_LOCAL_MACHINESOFTWAREORACLEHOME

Set the environment variable ORACLE_SID to XXXX, XXXX is your database SID.

Or right-click My Computer, Properties--Advanced--Environment Variables---System Variables--New, variable name=oracle_sid, variable value =XXXX, XXXX is your database SID.

Or before entering sqlplus, enter set oracle_sid=XXXX under the command line, XXXX is your database SID.

After the above steps, generally can solve the problem.

Recommended tutorial: "Oracle Video Tutorial"

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