Source database Details:
Host: SUN1
Database SID=PROD
Data file Mount Point = /DB/PROD
Target (Clone) Database Details:
Host: SUN1
Database SID=CLONE
Data file Mount Point: /DB/CLONE
Step 1 Create control file scripts on Primary instance.
SQL> alter database backup controlfile to trace;
Note: Above command will generate a cerate controlfile scripts in USER_DUMP_DISTINATION folder.
Step 2 Update create controle file scripts.
Step 3 If your Primary database using Spfile , then create pfile.
SQL> if your database is using spfile then create pfile from spfile.
Note: this Will generate initPROD.ora file
Step4 Rename initPROD.ora to initCLONE.ora file and update DB_NAME and CONTROL_FILE parameter.
Step 5 Set ORACLE_SID=CLONE on terminal and execute create controlfile script.
# export ORACLE_SID=CLONE
#sqlplus /nolog
SQL> conn / as sysdba
SQL>@
Step 6 open the database with resetlogs options