How to fix the Oracle error ORA-01034: ORACLE not available?

In this post, you’ll learn more about the Oracle ErrorORA-01034: ORACLE not available with the details on why you receive this error and the possible solution to fix it.

Oracle Error Description

ORA-01034: ORACLE not available

Reason for the Error ORA-01034: ORACLE not available

Oracle was not started up. Possible causes include the following:

– The SGA requires more space than was allocated for it.

– The operating-system variable pointing to the instance is improperly defined.

How to fix the Error ORA-01034: ORACLE not available ?

You can fix this error in Oracle by following the below steps

Refer to accompanying messages for possible causes and correct the problem mentioned in the other messages. If Oracle has been initialized, then on some operating systems, verify that Oracle was linked correctly. See the platform specific Oracle documentation.