上中下焦分别指什么

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SELECT ArticleID,Title FROM tbl_Articles WHERE ArticleID IN(1066526,1070993,1073901,988780,1107118,1063675,1062696,1045161,1082117,1085226,1065697,1072683,1075967,1074147,1027455,1073937,1078717,1063165,1075482,1074184,1078509,1069125,1062580,1067897,1084083,1064531,1060875,1095456,1054358,1059839) ORDER BY field (ArticleID,1066526,1070993,1073901,988780,1107118,1063675,1062696,1045161,1082117,1085226,1065697,1072683,1075967,1074147,1027455,1073937,1078717,1063165,1075482,1074184,1078509,1069125,1062580,1067897,1084083,1064531,1060875,1095456,1054358,1059839)