系统设计阶段包括哪些主要活动

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select * from tbl_Articles WHERE ArticleID=2005011 LIMIT 0,1
select * from tbl_Articles_data WHERE ArticleID=2005011 LIMIT 0,1
select * from tbl_Articles_sphinx where id=2005011 LIMIT 0,1
SELECT ArticleID,Title FROM tbl_Articles WHERE ArticleID IN(1922096,1124145,1906815,1078032,2326246,1072615,1129153,2780144,2609916,236181,1074712,223925,240074,213637,2557328,419624,1097271,296762,224301,2487954,123431,163334,1091751,307669,134487,1659458,320585,1121334,1449697,185602) ORDER BY field (ArticleID,1922096,1124145,1906815,1078032,2326246,1072615,1129153,2780144,2609916,236181,1074712,223925,240074,213637,2557328,419624,1097271,296762,224301,2487954,123431,163334,1091751,307669,134487,1659458,320585,1121334,1449697,185602)