求数学期望和方差

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SELECT ArticleID,Title FROM tbl_Articles WHERE ArticleID IN(3456221,321367,1106360,2187145,1119560,765360,1684094,1818637,1074306,1119512,2184971,3034633,1098203,1881405,3227288,1932058,2264836,1657489,1524318,487582,1097029,2028801,2651843,2840884,1586394,1132297,1125181,2679868,1544322,347218) ORDER BY field (ArticleID,3456221,321367,1106360,2187145,1119560,765360,1684094,1818637,1074306,1119512,2184971,3034633,1098203,1881405,3227288,1932058,2264836,1657489,1524318,487582,1097029,2028801,2651843,2840884,1586394,1132297,1125181,2679868,1544322,347218)