Oracle 11.2.0.4升級到12.2.0.1

操作系統版本：

[oracle@D2-LZY245 ~]$ cat /etc/redhat-release

CentOS Linux release 7.2.1511 (Core)

數據庫版本：

SQL> select * from v$version;

BANNER

--------------------------------------------------------------------------------

Oracle Database 11g Enterprise Edition Release 11.2.0.4.0 - 64bit Production

PL/SQL Release 11.2.0.4.0 - Production

CORE 11.2.0.4.0 Production

TNS for Linux: Version 11.2.0.4.0 - Production

NLSRTL Version 11.2.0.4.0 – Production

安裝12cR2：

[oracle@D2-LZY245 ~]$ ll linuxx64_12201_database.zip

-rw-r--r-- 1 oracle oinstall 3453696911 Sep 6 09:10 linuxx64_12201_database.zip

[oracle@D2-LZY245 ~]$ unzip linuxx64_12201_database.zip

[oracle@D2-LZY245 ~]$ export DISPLAY=192.168.17.100:0.0

[oracle@D2-LZY245 ~]$ cd database/

[oracle@D2-LZY245 database]$ ./runInstaller

執行腳本：

[root@D2-LZY245 ~]# /u01/app/oracle/product/12.2.0/dbhome_1/root.sh

安裝完成后將11g數據庫信息寫入/etc/oratab：

[oracle@D2-LZY245 admin]$ tail -1 /etc/oratab

jhsitgg1:/u01/app/oracle/product/11.2.0/dbhome_1:Y

在12cR2的主目錄下啟動dbua：

[oracle@D2-LZY245 database]$ cd /u01/app/oracle/product/12.2.0/dbhome_1/bin/

[oracle@D2-LZY245 bin]$ ./dbua

驗證：

升級完成后/etc/oratab已被修改為12cR2的主目錄：

[oracle@D2-LZY245 bin]$ tail -1 /etc/oratab

orcl:/u01/app/oracle/product/12.2.0/dbhome_1:N

手動修改環境變量：

[oracle@D2-LZY245 ~]$ env | grep ORACLE

ORACLE_SID=orcl

ORACLE_BASE=/u01/app/oracle

ORACLE_HOME=/u01/app/oracle/product/12.2.0/dbhome_1

查看數據庫版本已經升級：

SQL> select banner from v$version;

BANNER

--------------------------------------------------------------------------------

Oracle Database 12c Enterprise Edition Release 12.2.0.1.0 - 64bit Production

PL/SQL Release 12.2.0.1.0 - Production

CORE 12.2.0.1.0 Production

TNS for Linux: Version 12.2.0.1.0 - Production

NLSRTL Version 12.2.0.1.0 - Production