Oracle Database Support Articles
Oracle 11G : SQL Performance Analyzer : Real Application Testing

Database Administrators spend countless hours troubleshooting SQL statements that have taken upon a new life after a simple system or environment change. Oracle 11G SQL Performance Analyzer provides a solution to this never ending regressive statement issues. This new feature of Oracle 11G allows the database administrator to get a granular view of the impact to sql execution plans and statistics due to environment changes and the best part is that it completely automates the impact analysis process of extremely large SQL workloads

 
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.

 
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
 
Problem Management in ITIL

Problem Management focusses on being proactive to identify and avoid problems that may occur in the IT infrastructure. While Incident management processes are focussed on identifying failures and restoring the services, problem management tries to research and identify the root cause of an existing problems to avoid its re-ocurrence. Problem management also focusses on identifying issues proactively based on trend data available from the system management / service desk.

 
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