ISO/IEC 9075(1-4,9-11,13,14):2011 数据库标准,最校标准。很全，不容易找到免费的。ISO/IEC 9075 (1-4,9-11,13,14): 2011 database standards, most school standards. Very wide, not easy to find for free. (2014-08-30, Others, 13578KB, 下载16次)