三层循环的时间复杂度计算

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select * from tbl_Articles WHERE ArticleID=3156767 LIMIT 0,1
select * from tbl_Articles_data WHERE ArticleID=3156767 LIMIT 0,1
select * from tbl_Articles_sphinx where id=3156767 LIMIT 0,1
SELECT ArticleID,Title FROM tbl_Articles WHERE ArticleID IN(1110255,1115563,1106711,1107833,1057170,1096248,1094057,1051535,1114836,1079978,1110516,1083215,1084829,1086194,1102282,1113618,1042020,1076095,1069677,1071243,1077496,1115139,1105753,1075760,1104951,1110067,1070014,1104745,992026,1098219) ORDER BY field (ArticleID,1110255,1115563,1106711,1107833,1057170,1096248,1094057,1051535,1114836,1079978,1110516,1083215,1084829,1086194,1102282,1113618,1042020,1076095,1069677,1071243,1077496,1115139,1105753,1075760,1104951,1110067,1070014,1104745,992026,1098219)