平均偏差和相对平均偏差怎么计算

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select * from tbl_Articles WHERE ArticleID=112327 LIMIT 0,1
select * from tbl_Articles_data WHERE ArticleID=112327 LIMIT 0,1
select * from tbl_Articles_sphinx where id=112327 LIMIT 0,1
SELECT ArticleID,Title FROM tbl_Articles WHERE ArticleID IN(1120273,1080193,1056046,1109977,1089207,1062993,1102674,1084753,1086680,1034501,1043987,1120362,1123022,1106370,1086510,1107745,1118505,1107995,1118537,1125189,1056672,1125019,1092690,1107062,1101437,1126002,1107134,1063867,1126054,1095812) ORDER BY field (ArticleID,1120273,1080193,1056046,1109977,1089207,1062993,1102674,1084753,1086680,1034501,1043987,1120362,1123022,1106370,1086510,1107745,1118505,1107995,1118537,1125189,1056672,1125019,1092690,1107062,1101437,1126002,1107134,1063867,1126054,1095812)