如何分析样本误差并推断总体误差

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select * from tbl_Articles WHERE ArticleID=159572 LIMIT 0,1
select * from tbl_Articles_data WHERE ArticleID=159572 LIMIT 0,1
select * from tbl_Articles_sphinx where id=159572 LIMIT 0,1
SELECT ArticleID,Title FROM tbl_Articles WHERE ArticleID IN(1618643,3262753,111397,3105046,1923816,2078806,107724,2568256,1406352,3243587,2961799,2507249,112270,361986,1770908,2704204,2267634,1714817,109027,109049,110127,2584737,107397,107332,111662,108083,672859,2487327,1128603,1292185) ORDER BY field (ArticleID,1618643,3262753,111397,3105046,1923816,2078806,107724,2568256,1406352,3243587,2961799,2507249,112270,361986,1770908,2704204,2267634,1714817,109027,109049,110127,2584737,107397,107332,111662,108083,672859,2487327,1128603,1292185)