I reads from some hand-book, about PostgreSQL
and i found something make me confusing. It's
about the Commercial-Level. I've been thinking
that PostgreSQL is a Completely-Free. So if 
there is a Commercial-Level, Could anybody 
gimme some explanation about the commercial 
level. Are there any special-things about that..?? 
Thank's and GOD Bless You All.
Yudha Setiawan.
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