Database Administration (MOSC)

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queries of few commands

edited Aug 27, 2013 11:04PM in Database Administration (MOSC) 4 commentsAnswered ✓
Hi,

I have few below two questions.Can please calrify.Though these are very basic but still i want take your thoughts and information on this.

1.drop user "username" cascade <--without giving cascade it will not drop ..what exactly the cascade means.
2.
alter index "index_name" rebuild.
alter index "index_name" colease.

please give difference of above and please tell me which one is the best.

3.i have table of 1 lakh records and on that table i have one index.Now if i insert the 1 lakh records into table,will my index get updated automatically or i need to rebuild.

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