ORA-01033: ORACLE initialization or shutdown in progress：
The first step, sqlplus / NOLOG
The second step, SQL> Connect / AS sysdba
Tip: Successfully
The third step, SQL> the shutdown Normal
Tip:
Database has been closed
already uninstalled database
ORACLE instance shut down
The fourth step, SQL> the Startup Mount
Tip:
Total Area System, Ltd. Free Join 5,110,898,688 bytes
Fixed Size 2.80648 million bytes
Variable Size 1,107,299,632 bytes
Database Buffers 3,992,977,408 bytes
Redo Buffers 7815168 bytes
database loading is completed.
The fifth step, SQL> the ALTER Open Database
Step 5 generally forget to do, you connect to the database will lead to error ORA-01033