ROWID - Hexa decimal number each and every row having unique.Used in searching.
ROWNUM - It is a integer number also unique for sorting Normally TOP N Analysys.
Other Psudo Column are
NEXTVAL,CURRVAL Of sequence are some exampls
psudo columns are default columns provided by oracle
Explain what is the function of having Virtual Internet Protocol Address (VIP) in Oracle RAC?
Please tell me what is the function of Grid Naming service used in Oracle RAC?
Do you know Oracle Grid Infrastructure?
Do you know the Load Balancing Advisory?
Tell me why is Cluster Verification Utility so important in Oracle RAC?
Can you explain what are the benefits of Oracle Real Application Clusters (RAC)?
Tell me what are the components required to manage Oracle Real Application Clusters Database?
Do you know what is the purpose of SCAN?
Do you know what are the tools provided in Oracle Enterprise Manager?
How to setup the RMAN tape backups?
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