<div>
Did you check the Alert log?<br />
What does it say?
</div>


Did you check the Alert log?
What does it say?

<div>
Yes tried, still has some problems. Let check modify.
</div>


Yes tried, still has some problems. Let check modify.

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<div class="content wysiwyg-content">
SQL&gt; startup &nbsp;<br />
ORACLE instance started.<br />
<br />
Total System Global Area &nbsp;146472960 bytes<br />
Fixed Size &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;1335080 bytes<br />
Variable Size &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;92274904 bytes<br />
Database Buffers &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 50331648 bytes<br />
Redo Buffers &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;2531328 bytes<br />
ORA-00205: error in identifying control file, check alert log for more info<br />
<br />
<br />
SQL&gt;
</div>
</div>


SQL> startup  
ORACLE instance started.

Total System Global Area  146472960 bytes
Fixed Size                  1335080 bytes
Variable Size              92274904 bytes
Database Buffers           50331648 bytes
Redo Buffers                2531328 bytes
ORA-00205: error in identifying control file, check alert log for more info


SQL>

controlfile error

Oracle is an object-relational database management system. It supports a large number of languages and application development frameworks. Its primary languages are SQL, PL/SQL and Java, but it also includes support for C and C++. Oracle also has its own enterprise modules and application server software.