约数是什么意思

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select * from tbl_Articles WHERE ArticleID=1114034 LIMIT 0,1
select * from tbl_Articles_data WHERE ArticleID=1114034 LIMIT 0,1
select * from tbl_Articles_sphinx where id=1114034 LIMIT 0,1
SELECT ArticleID,Title FROM tbl_Articles WHERE ArticleID IN(466337,3282863,449987,383953,418195,439458,1099635,377267,453517,1117866,497138,1110245,1119692,1101311,492530,481818,457955,420224,1094371,430088,2964226,387272,1114802,1113686,376171,473373,1109683,87052,87144,432204) ORDER BY field (ArticleID,466337,3282863,449987,383953,418195,439458,1099635,377267,453517,1117866,497138,1110245,1119692,1101311,492530,481818,457955,420224,1094371,430088,2964226,387272,1114802,1113686,376171,473373,1109683,87052,87144,432204)