开关上的s和o代表什么

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select * from tbl_Articles WHERE ArticleID=441535 LIMIT 0,1
select * from tbl_Articles_data WHERE ArticleID=441535 LIMIT 0,1
select * from tbl_Articles_sphinx where id=441535 LIMIT 0,1
SELECT ArticleID,Title FROM tbl_Articles WHERE ArticleID IN(1067917,1061384,1103845,1043798,1074377,1106529,1088413,1124297,1062396,1106324,1125498,1124027,1067139,1104210,1123775,1133123,1107693,1106597,1132381,1304199,1044675,1125235,1129599,1051341,1074914,1116533,1125031,1130324,1106571,989221) ORDER BY field (ArticleID,1067917,1061384,1103845,1043798,1074377,1106529,1088413,1124297,1062396,1106324,1125498,1124027,1067139,1104210,1123775,1133123,1107693,1106597,1132381,1304199,1044675,1125235,1129599,1051341,1074914,1116533,1125031,1130324,1106571,989221)