While browsing I came across this application MS Visio. So want to know what does it do and how does it help. Can anyone help me on this.
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closed as not a real question by Mokubai♦, Mehper C. Palavuzlar, BinaryMisfit Jan 19 '11 at 12:48
It's difficult to tell what is being asked here. This question is ambiguous, vague, incomplete, overly broad, or rhetorical and cannot be reasonably answered in its current form. For help clarifying this question so that it can be reopened, visit the help center. If this question can be reworded to fit the rules in the help center, please edit the question.
Visio is a Microsoft tool for drawing diagrams, including database diagrams.
When it comes to database stuff, it supports reverse engineering, so you start from an existing database and automatically obtain you db diagram.
Depending on your needs, there are a lot of Visio alternatives. For simpler diagrams you can check out some on line applications too.