a的平方加b的平方等于什么公式

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select * from tbl_Articles WHERE ArticleID=1484439 LIMIT 0,1
select * from tbl_Articles_data WHERE ArticleID=1484439 LIMIT 0,1
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SELECT ArticleID,Title FROM tbl_Articles WHERE ArticleID IN(1101629,1084909,1077240,1114048,1046706,1084259,1120219,1055824,1096473,1106308,1076095,1078294,1049048,1109887,1120645,1089454,1119478,1111930,1087499,1078725,1090541,1104745,1105543,1107062,1121684,1118481,1057595,1054136,1075907,1090909) ORDER BY field (ArticleID,1101629,1084909,1077240,1114048,1046706,1084259,1120219,1055824,1096473,1106308,1076095,1078294,1049048,1109887,1120645,1089454,1119478,1111930,1087499,1078725,1090541,1104745,1105543,1107062,1121684,1118481,1057595,1054136,1075907,1090909)