在我们安装完数据库之后，需要对数据库组件进行一次检查，查看状态是否是可用的。在手动建库的时候，存在安装的组件不全，需要我们手动安装所需组件。这里提供查看组件的方法。
--查看系统中的组件
SQL> select comp_id,comp_name,status,CON_ID from cdb_registry;
COMP_ID COMP_NAME STATUS CON_ID
------------------------------ -------------------------------------------------- ---------------------- ----------
CATALOG Oracle Database Catalog Views VALID 1
CATPROC Oracle Database Packages and Types VALID 1
JAVAVM JServer JAVA Virtual Machine VALID 1
XML Oracle XDK VALID 1
CATJAVA Oracle Database Java Packages VALID 1
APS OLAP Analytic Workspace VALID 1
RAC Oracle Real Application Clusters OPTION OFF 1
XDB Oracle XML Database VALID 1
OWM Oracle Workspace Manager VALID 1
CONTEXT Oracle Text VALID 1
ORDIM Oracle Multimedia VALID 1
COMP_ID COMP_NAME STATUS CON_ID
------------------------------ -------------------------------------------------- ---------------------- ----------
SDO Spatial VALID 1
XOQ Oracle OLAP API VALID 1
APEX Oracle Application Express VALID 1
14 rows selected.
--显示数据库选项和特性
SQL> col parameter for a40
SQL> col value for a40
SQL> select * from v$option;
PARAMETER VALUE CON_ID
---------------------------------------- ---------------------------------------- ----------
Partitioning TRUE 0
Objects TRUE 0
Real Application Clusters FALSE 0
Advanced replication TRUE 0
Bit-mapped indexes TRUE 0
Connection multiplexing TRUE 0
Connection pooling TRUE 0
Database queuing TRUE 0
Incremental backup and recovery TRUE 0
Instead-of triggers TRUE 0
Parallel backup and recovery TRUE 0
PARAMETER VALUE CON_ID
---------------------------------------- ---------------------------------------- ----------
Parallel execution TRUE 0
Parallel load TRUE 0
Point-in-time tablespace recovery TRUE 0
Fine-grained access control TRUE 0
Proxy authentication/authorization TRUE 0
Change Data Capture TRUE 0
Plan Stability TRUE 0
Online Index Build TRUE 0
Coalesce Index TRUE 0
Managed Standby TRUE 0
Materialized view rewrite TRUE 0
PARAMETER VALUE CON_ID
---------------------------------------- ---------------------------------------- ----------
Database resource manager TRUE 0
Spatial TRUE 0
Automatic Storage Management FALSE 0
Export transportable tablespaces TRUE 0
Transparent Application Failover TRUE 0
Fast-Start Fault Recovery TRUE 0
Sample Scan TRUE 0
Duplexed backups TRUE 0
Java TRUE 0
OLAP Window Functions TRUE 0
Block Media Recovery TRUE 0
PARAMETER VALUE CON_ID
---------------------------------------- ---------------------------------------- ----------
Fine-grained Auditing TRUE 0
Application Role TRUE 0
Enterprise User Security TRUE 0
Oracle Data Guard TRUE 0
Oracle Label Security FALSE 0
OLAP TRUE 0
Basic Compression TRUE 0
Join index TRUE 0
Trial Recovery TRUE 0
Advanced Analytics TRUE 0
Online Redefinition TRUE 0
PARAMETER VALUE CON_ID
---------------------------------------- ---------------------------------------- ----------
Streams Capture TRUE 0
File Mapping TRUE 0
Block Change Tracking TRUE 0
Flashback Table TRUE 0
Flashback Database TRUE 0
Transparent Data Encryption TRUE 0
Backup Encryption TRUE 0
Unused Block Compression TRUE 0
Oracle Database Vault FALSE 0
Result Cache TRUE 0
SQL Plan Management TRUE 0
PARAMETER VALUE CON_ID
---------------------------------------- ---------------------------------------- ----------
SecureFiles Encryption TRUE 0
Real Application Testing TRUE 0
Flashback Data Archive TRUE 0
DICOM TRUE 0
Active Data Guard TRUE 0
Server Flash Cache TRUE 0
Advanced Compression TRUE 0
XStream TRUE 0
Deferred Segment Creation TRUE 0
Unified Auditing FALSE 0
Management Database FALSE 0
PARAMETER VALUE CON_ID
---------------------------------------- ---------------------------------------- ----------
I/O Server FALSE 0
ASM Proxy Instance FALSE 0
Exadata Discovery TRUE 0
Data Mining TRUE 0
Global Data Services TRUE 0
Adaptive Execution Plans TRUE 0
Table Clustering TRUE 0
Zone Maps TRUE 0
Real Application Security TRUE 0
Privilege Analysis TRUE 0
Data Redaction TRUE 0
PARAMETER VALUE CON_ID
---------------------------------------- ---------------------------------------- ----------
Cross Transportable Backups TRUE 0
Cache Fusion Lock Accelerator TRUE 0
Snapshot time recovery TRUE 0
Heat Map TRUE 0
Automatic Data Optimization TRUE 0
Transparent Sensitive Data Protection TRUE 0
In-Memory Column Store TRUE 0
Advanced Index Compression TRUE 0
In-Memory Aggregation TRUE 0
86 rows selected.