隨著Oracle19c 被越來越多的客戶使用，pdb 模式越來越多，如何更好更快速的檢查他們的資訊呢，Oracle12c以後多了一個cdb_開頭的檢視，來進行統一檢查。 下面節選幾個常用命令

#### PDB檢查
``` sql
--檢視pdb資訊   or dba_pdbs
set lines 160
col name for a20
col open_time for a40
select con_id,dbid,name,open_mode,open_time,creation_time from v$pdbs;

--檢視CDB部分資訊
set lines 160
col con_name for a30
select c.con_id,c.name con_name,t.tablespace_name,t.contents,t.status 
from v$containers c,cdb_tablespaces t where c.con_id=t.con_id and t.contents='UNDO' 
order by 1,2;

--跟隨CDB啟動
alter pluggable database firsoul01 save state;

--檢視每個pdb大小
select c.name,round(sum(s.bytes/1024/1024/1024),2) size_gb 
from cdb_segments s,v$containers c where c.con_id=s.con_id group by c.name order by 2 desc;

--連線 or tnsnames
alter session set container=orclpdb;

--檢視pdb的服務名
col pdb for a15
col name for a20
col network_name for a20
SELECT PDB, name,NETWORK_NAME, CON_ID FROM CDB_SERVICES
WHERE PDB IS NOT NULL AND CON_ID > 2 ORDER BY PDB;

--檢視歷史pdb資訊
col db_name for a15
col pdb_name for a15
col CLONED_FROM_PDB_NAME for a20
SELECT DB_NAME, CON_ID, pdb_id,PDB_NAME, OPERATION, OP_TIMESTAMP, CLONED_FROM_PDB_NAME  
FROM CDB_PDB_HISTORY  WHERE CON_ID<>pdb_id and pdb_id>2 
and db_name=(select name  from v$database) ORDER BY PDB_ID;
```

#### 表空間管理
``` sql
--檢視錶空間
break on name skip 1
col name for a20
col tablespace_name for a30
set linesize 200 pagesize 500
select c.name name,f.tablespace_name tablespace_name,
round((d.sumbytes/1024/1024/1024),2) total_without_extend_GB,
round(((d.sumbytes+d.extend_bytes)/1024/1024/1024),2) total_with_extend_GB,
round((f.sumbytes+d.Extend_bytes)/1024/1024/1024,2) free_with_extend_GB,
round((d.sumbytes-f.sumbytes)/1024/1024/1024,2) used_GB,
round((d.sumbytes-f.sumbytes)*100/(d.sumbytes+d.extend_bytes),2) used_percent_with_extend
from (select con_id,tablespace_name,sum(bytes) sumbytes from cdb_free_space group by con_id,tablespace_name) f, 
(select con_id,tablespace_name,sum(aa.bytes) sumbytes,sum(aa.extend_bytes) extend_bytes from
 (select  con_id,nvl(case  when autoextensible ='YES' then (case when (maxbytes-bytes)>=0 then (maxbytes-bytes) end) end,0) Extend_bytes
,tablespace_name,bytes  from cdb_data_files) aa group by con_id,tablespace_name) d,v$containers c
where  (f.con_id=d.con_id and f.tablespace_name=d.tablespace_name) and f.con_id=c.con_id
order by  name,used_percent_with_extend desc;

--檢視所有資料檔案
break on cdbname skip 1
set lines 200 pages 999
col cdbname for a10
col dbfile for a80
select c.name cdbname,d.file# dfile,d.name dbfile,round(f.bytes/1024/1024/1024,2) size_gb,f.AUTOEXTENSIBLE ,d.CREATION_TIME from v$datafile d,v$containers c,cdb_data_files f where c.con_id=d.con_id and d.name=f.file_name order by cdbname,d.creation_time;
```

#### 使用者管理
``` sql
--檢視每個pdb下使用者大小
break on pname skip 1
col owner for a20
col pname for a15
select c.name pname,s.owner,round(sum(s.bytes/1024/1024/1024),2) size_gb 
from cdb_segments s,v$containers c 
where c.con_id=s.con_id group by c.name,s.owner order by 1,3 desc;

--查詢使用者名稱、鎖定狀態、表空間、配置檔案、許可權---
break on cname skip 1
set pagesize 999
set linesize 150
col cname for a20
col username for a25
col ACCOUNT_STATUS for a20
col DEFAULT_TABLESPACE for a20
col PROFILE for a20
alter session set nls_date_format='yyyy-mm-dd hh24:mi:ss';
select v.name cname,c.username,',',c.ACCOUNT_STATUS,','
,c.DEFAULT_TABLESPACE,',',c.PROFILE,c.CREATED 
from cdb_users c,v$containers v where c.con_id=v.con_id order by v.name,c.created;
```

其他可以參考以上語句，cdb開頭檢視 結合v$containers ，列出pdb的命令，再個 可根據自己喜好，可以選擇排除種子pdb、cdb等輸出。

【PDB】DBA常用命令之Oracle12.2+ cdb資料庫統一檢查

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