什么是实验标准偏差

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select * from tbl_Articles WHERE ArticleID=159370 LIMIT 0,1
select * from tbl_Articles_data WHERE ArticleID=159370 LIMIT 0,1
select * from tbl_Articles_sphinx where id=159370 LIMIT 0,1
SELECT ArticleID,Title FROM tbl_Articles WHERE ArticleID IN(1113421,1104195,1052887,1041958,1100211,1088490,1056858,1102814,1107857,1081819,1072443,1086608,1109843,1077976,1067924,1060645,1121130,1109669,1111316,1066018,1069477,1089008,1077826,1106196,1068258,1112901,1066362,1074198,1076277,1071203) ORDER BY field (ArticleID,1113421,1104195,1052887,1041958,1100211,1088490,1056858,1102814,1107857,1081819,1072443,1086608,1109843,1077976,1067924,1060645,1121130,1109669,1111316,1066018,1069477,1089008,1077826,1106196,1068258,1112901,1066362,1074198,1076277,1071203)