512是什么意思

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select * from tbl_Articles WHERE ArticleID=1409375 LIMIT 0,1
select * from tbl_Articles_data WHERE ArticleID=1409375 LIMIT 0,1
select * from tbl_Articles_sphinx where id=1409375 LIMIT 0,1
SELECT ArticleID,Title FROM tbl_Articles WHERE ArticleID IN(1100111,1685381,2017687,694351,1604039,589547,1550903,671339,1073606,954512,1200036,1065224,1077220,369799,760218,757061,1175401,417612,1207062,391011,565336,1066024,697459,477227,1151596,903003,613671,1134180,1089253,820221) ORDER BY field (ArticleID,1100111,1685381,2017687,694351,1604039,589547,1550903,671339,1073606,954512,1200036,1065224,1077220,369799,760218,757061,1175401,417612,1207062,391011,565336,1066024,697459,477227,1151596,903003,613671,1134180,1089253,820221)