Execute the following statement to solve the problem.
SQL > Connect sys / 123 As Sysdba; connected. SQL > Shutdown Normalora - 01109 : The database has not been opened and has been detached. The Oracle routine has been disabled. SQL > Startup Mount; the Oracle routine has been started. Total system global area 171966464 Bytesfixed size 787988 Bytesvariable size 145750508 Bytes Database Buffers 25165824 Bytesredo Buffers 262144 The bytes database has been loaded. SQL > Alter Database Open ; SQL > Alter Database Open ; Alter Database Open * The 1 Line Error: ora - 01531 : Database SQL is enabled for the routine > Shutdown Normal prompt: the database has been disabled and the Oracle routine of the database has been uninstalled. The SQL statement has been disabled. > Startup Mount; the Oracle routine has been started. Total system global area 171966464 Bytesfixed size 787988 Bytesvariable size 145750508 Bytes Database Buffers25165824 Bytesredo Buffers 262144 The bytes database has been loaded. At this point, the problem is solved.