表的误差怎么算的

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select * from tbl_Articles WHERE ArticleID=343412 LIMIT 0,1
select * from tbl_Articles_data WHERE ArticleID=343412 LIMIT 0,1
select * from tbl_Articles_sphinx where id=343412 LIMIT 0,1
SELECT ArticleID,Title FROM tbl_Articles WHERE ArticleID IN(1077639,1117405,1096248,1095700,1069045,1275261,1071507,1096989,1051075,1105697,1082203,1113762,1067966,1051535,1091183,1073066,1056384,1065333,1070963,1074923,1120410,1084197,1087499,1064553,1091952,1066888,1070796,1064641,1103287,1079978) ORDER BY field (ArticleID,1077639,1117405,1096248,1095700,1069045,1275261,1071507,1096989,1051075,1105697,1082203,1113762,1067966,1051535,1091183,1073066,1056384,1065333,1070963,1074923,1120410,1084197,1087499,1064553,1091952,1066888,1070796,1064641,1103287,1079978)