What is the purpose of init.ora. ? how many init.ora exist
in oracle installation? suppose there are 3 database on one
oracle server, how many init.ora do I have? what are
various database objects? how will you identify memmory
related performace issue in oralce? any idea about basic
architure difference of oracle and db2? comment on which is
better , with reasons? what is a fuction based index? is it
recommended to use the same. ? what is global temporay
table? what is teh signification of the parameter
session_cached_cursor ?
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Answer / karthik
What is the purpose of init.ora. ?
this is used for the start up and maintanence of the
databse also for security purposes.u can hv only 1 init.ora
per database.
what is a fuction based index?
There will be some situation where u always use two colums
of a table in a querey(always combined) for getting rows or
getting some fn ie:getting sal+comm point of a
employee.what we usually do is creating 2 indexes seperately
for sal and comm point.instead u write a fn for adding sal
+comm pt and creating index for that.hope u will be clear
now.but unless and until ur data results is large dont use
it.
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