select convert(decimal(18,2),rand()), convert(decimal(18,2),rand())

 select newid()

 SELECT substring(LTrim(abs(checksum(newid()))),0,5)

 update tablename

 set  FA=100,

 FB=ROUND(RAND(substring(LTrim(abs(checksum(newid()))),0,6)) * 50, 0),

 FC=ROUND(RAND(substring(LTrim(abs(checksum(newid()))),0,6)) * 50, 0)