一、說(shuō)明
我們?cè)诎惭b數(shù)據(jù)庫(kù)集群的時(shí)候，最后有一步是使用DBCA建庫(kù)，建庫(kù)的過(guò)程中到底在集群資源中做了什么呢？實(shí)際上添加了一個(gè)ora.dbname.db這個(gè)集群資源。
刪除數(shù)據(jù)庫(kù)的方法
1、使用DBCA進(jìn)行刪除，這個(gè)大家都會(huì)
2、手動(dòng)刪庫(kù)，先刪除集群資源ora.dbanme.db,然后到ASM中刪除相關(guān)數(shù)據(jù)即可。

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二、操作步驟
1、查看數(shù)據(jù)庫(kù)配置

$srvctl config database -d orcl
Database unique name: orcl
Database name: orcl
Oracle home: /u01/app/oracle/product/12.1.0/dbhome_1
Oracle user: oracle
Spfile: +DATADG/ORCL/PARAMETERFILE/spfile.268.954540133
Password file: +DATADG/ORCL/PASSWORD/pwdorcl.256.954539259
Domain: 
Start options: open
Stop options: immediate
Database role: PRIMARY
Management policy: AUTOMATIC
Server pools: 
Disk Groups: DATADG
Mount point paths: 
Services: 
Type: RAC
Start concurrency: 
Stop concurrency: 
OSDBA group: dba
OSOPER group: oper
Database instances: orcl1,orcl2
Configured nodes: rac01,rac02
Database is administrator managed
$

2、刪除資源

--grid用戶執(zhí)行
srvctl stop database -d orcl
--oracle 用戶執(zhí)行
$srvctl remove instance -d orcl -i  orcl1
Remove instance from the database orcl? (y/[n]) y
$srvctl remove instance -d orcl -i  orcl2
Remove instance from the database orcl? (y/[n]) y
$srvctl config database -d orcl
Database unique name: orcl
Database name: orcl
Oracle home: /u01/app/oracle/product/12.1.0/dbhome_1
Oracle user: oracle
Spfile: +DATADG/ORCL/PARAMETERFILE/spfile.268.954540133
Password file: +DATADG/ORCL/PASSWORD/pwdorcl.256.954539259
Domain: 
Start options: open
Stop options: immediate
Database role: PRIMARY
Management policy: AUTOMATIC
Server pools: 
Disk Groups: DATADG
Mount point paths: 
Services: 
Type: RAC
Start concurrency: 
Stop concurrency: 
OSDBA group: dba
OSOPER group: oper
Database instances: 
Configured nodes: 
Database is administrator managed
$
$srvctl remove database -d orcl
Remove the database orcl? (y/[n]) y

3、再添加資源

--oracle 用戶 
srvctl add database -d orcl -o $ORACLE_HOME
srvctl add instance -d orcl -n rac01 -i orcl1
srvctl add instance -d orcl -n rac02 -i orcl2

$srvctl add database -d orcl -o $ORACLE_HOME
$srvctl config database -d orcl
Database unique name: orcl
Database name: 
Oracle home: /u01/app/oracle/product/12.1.0/dbhome_1
Oracle user: oracle
Spfile: 
Password file: 
Domain: 
Start options: open
Stop options: immediate
Database role: PRIMARY
Management policy: AUTOMATIC
Server pools: 
Disk Groups: 
Mount point paths: 
Services: 
Type: RAC
Start concurrency: 
Stop concurrency: 
OSDBA group: dba
OSOPER group: oper
Database instances: 
Configured nodes: 
Database is administrator managed
$srvctl add instance -d orcl -n rac01 -i orcl1
$srvctl add instance -d orcl -n rac02 -i orcl2
$

$srvctl config database -d orcl
Database unique name: orcl
Database name: 
Oracle home: /u01/app/oracle/product/12.1.0/dbhome_1
Oracle user: oracle
Spfile: 
Password file: 
Domain: 
Start options: open
Stop options: immediate
Database role: PRIMARY
Management policy: AUTOMATIC
Server pools: 
Disk Groups: 
Mount point paths: 
Services: 
Type: RAC
Start concurrency: 
Stop concurrency: 
OSDBA group: dba
OSOPER group: oper
Database instances: orcl1,orcl2
Configured nodes: rac01,rac02
Database is administrator managed
$

srvctl modify database -db orcl  -spfile '+DATADG/ORCL/PARAMETERFILE/spfile.268.954540133' -pwfile '+DATADG/ORCL/PASSWORD/pwdorcl.256.954539259'

$srvctl modify database -db orcl  -spfile '+DATADG/ORCL/PARAMETERFILE/spfile.268.954540133' -pwfile '+DATADG/ORCL/PASSWORD/pwdorcl.256.954539259'
$srvctl start database -d orcl
$