


        SQL Rule:
        
        the keywords: SELCT, FROM, etc are never case senstive
        the DB objects (Table/column/etc): are NOT case senstive unless
                                A) the DB was created as case senstive (not the default)
                                B) I put the name in double quotes
                                
        Double Quotes (") are Datbase Objects (Tabel/Column/etc)
        Single Quotes (') are literals 'John Smith'
           for example: Select * from world.city where country_code = 'BRA'
           literals ARE case senstive, for example this command will return no results
             Select * from world.city where country_code = 'Bra'
             
        in SQL '--' is a comment
