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The use of PRIMARY KEY as a table constraint is mutually incompatible with PRIMARY KEY as a column constraint . ASME supports Engineers Without Borders and believes its efforts strongly contribute to the new global focus of Engineers Week , in meaningful ways . newtable New name for an existing column . IEEE-USA recommends policies and implements programs specifically intended to serve and benefit the members , the profession , and the public in the United States in appropriate professional areas of economic , ethical , legislative , social and technology policy concern . Electrical engineers design products that meet human needs for today and tomorrow - - huge power-generating systems in dams as well as the tiny electronic circuits that keep spacecraft on correct trajectory a billion miles from Earth .