单双什么意思

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select * from tbl_Articles WHERE ArticleID=834158 LIMIT 0,1
select * from tbl_Articles_data WHERE ArticleID=834158 LIMIT 0,1
select * from tbl_Articles_sphinx where id=834158 LIMIT 0,1
SELECT ArticleID,Title FROM tbl_Articles WHERE ArticleID IN(1092163,1460519,1063569,1112824,1077695,1092053,1509362,1067667,1076702,2113551,1093655,1066872,1063151,1076277,1904787,1487226,1070732,1068973,2115700,1066362,1045314,1559690,1062580,1123759,1072703,1132037,1087351,1102310,1074312,1791181) ORDER BY field (ArticleID,1092163,1460519,1063569,1112824,1077695,1092053,1509362,1067667,1076702,2113551,1093655,1066872,1063151,1076277,1904787,1487226,1070732,1068973,2115700,1066362,1045314,1559690,1062580,1123759,1072703,1132037,1087351,1102310,1074312,1791181)