Submitted by John Watson on Sun, 2014-05-11 06:16
Can this parameter really boost performance? This simple test suggests that it can.
Submitted by John Watson on Sat, 2014-05-10 06:28
Unified Audit is a major architectural change: fast, easy, and impossible for the DBA to bypass. On upgrade to Oracle 12c, you really should enable it. The earlier method that we all use is pretty awful.
Submitted by Lalit Kumar B on Sat, 2014-05-03 09:48
It is a frequently asked question in almost all the Oracle forums. There have had been numerous questions/posts regarding "But how to generate the trace file?" Well, it might seem a heck of a task, however, looking it step by step will make you understand that it is actually not that difficult.
Usually, database application developers do not have the required/necessary permissions/privileges to do all the steps that I will mention below. However, most of the steps could be done by application developer. A few steps will need a DBA privilege.
Submitted by Lalit Kumar B on Sat, 2014-05-03 09:20
An important thing regarding function, you would agree with me that, at least once a PL/SQL developer must have heard that "A function MUST ALWAYS RETURN a VALUE of proper datatype". Having been said that a million times on various platforms, still developers make this mistake.
Submitted by Lalit Kumar B on Sat, 2014-05-03 08:52
Submitted by Lalit Kumar B on Fri, 2014-05-02 09:39
One of the most important things that a developer does apart from just code development is, debugging. Isn’t it? Yes, debugging the code to fix the errors that are raised. But, in order to actually debug, we need to first capture them somewhere. As of now, any application has it’s own user defined error logging table(s).
Imagine, if the tool is rich enough to automatically capture the errors. It is very much possible now with the new SQL*PLus release 11.1
Submitted by John Watson on Mon, 2014-04-07 09:02
The concept of an adaptive plan is that execution of a statement can start with one plan, and (during execution) switch to another. A pretty amazing capability. No need to run the statement to completion and try again: correct it in flight.
Submitted by John Watson on Sat, 2014-02-22 09:26
I was at the Connecticut Oracle User Group re-launch meeting last week, talking about some of the 12c new features that I specially like: those related to what I call "the self-learning database".
Submitted by John Watson on Sat, 2014-02-01 09:13
Why does the CBO get it wrong? Often because it has insufficient information. No matter how often you analyze your tables, if your queries use multi-column predicates, the CBO will mis-calculate the cardinalities. You have to understand your data, and create extended statistics to correlate the columns. How many people do this? Hardly any. Not a problem any more: release 12c can do this for you. If you configure it appropriately.
Submitted by prabodha.sahoo on Thu, 2014-01-30 03:50
Oracle Pipelined Table Functions
Basically, when you would like a PLSQL (or java or c) routine to be the «source»
of data -- instead of a table -- you would use a pipelined function.
PIPELINED functions will operate like a table.