负数怎么开平方教下如根号36

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select * from tbl_Articles_data WHERE ArticleID=368644 LIMIT 0,1
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SELECT ArticleID,Title FROM tbl_Articles WHERE ArticleID IN(1129543,1130212,1104189,1073900,1118613,1115885,1096432,1071533,1132613,1041659,1119642,1071759,1048128,1075807,1075548,1119712,1131929,1105029,1128773,1126736,1005077,1120362,1128411,1042879,1065863,1086394,1131513,1120667,1099707,1073891) ORDER BY field (ArticleID,1129543,1130212,1104189,1073900,1118613,1115885,1096432,1071533,1132613,1041659,1119642,1071759,1048128,1075807,1075548,1119712,1131929,1105029,1128773,1126736,1005077,1120362,1128411,1042879,1065863,1086394,1131513,1120667,1099707,1073891)