Oracle Database Administration, Performance Tuning, Backup Recovery
ORA-01031 : Insufficient Privileges
ORA-01031 is generated by oracle in most cases when the user lacks privileges to perform the particular operation. In generic cases, ORA-01031 error is thrown when the user is unable to create an object like table, view procedure etc., due to an incorrect setup in the security layer. In some cases ORA-01031 can also happen during instance startup.
 
Oracle 11G : OLTP Table Compression : Advanced Compression Option

Oracle 11G introduces a new option to support compression of various structured, unstructured and other backup data. This option named Oracle Advanced Compression option provides multiple features including OLTP table compression ( this feature extends the  basic table compression that was available since 9i ) , Secure File Deduplication, RMAN Compression and Data Pump Compression. Oracle will continue to provide the basic Table compression in the Enterprise Edition of its product, but customers will have to license the new features along with Oracle 11G to get OLTP Table Compression and others.

 
ORA-00936-Missing-Expression
ORA-00936, ORA-936 is a generic error indicating a missing expression in the SQL statement that you have just executed.  Most probably this error is indicating that you have either missed a , [ comma ] or the from clause or where clause or some other part of the SQL that has just been parsed.
 
ORA-06550
ORA-06550, ORA 6550 error is a generic error that indicates the line number at which the error has occured. This error is followed by a descriptive message that actually points to the type of oracle error that has occurred
 
Oracle 11G : Database Replay : Real Application Testing

Oracle 11G introduces multiple new features around Real Application testing. This feature allows the database administrator to take control of the simulation of workload to test the impact of infrastructure and database level changes through the recreation of actual workloads.  Enterprises today face a daunting task and cost of retesting their entire application for every infrastructure or database change thats rolled out in the Organization. This feature is particularly helpful during OS, Oracle patch rollouts, conversion to RAC, movement to low cost grid computing hardware etc.

 
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