2倍的根号下二分之一是多少

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select * from tbl_Articles WHERE ArticleID=2023395 LIMIT 0,1
select * from tbl_Articles_data WHERE ArticleID=2023395 LIMIT 0,1
select * from tbl_Articles_sphinx where id=2023395 LIMIT 0,1
SELECT ArticleID,Title FROM tbl_Articles WHERE ArticleID IN(1304130,1055295,1132637,1066564,1121528,1067233,1124400,1065729,1127479,1050367,1133355,1051045,1073846,1095792,1109925,988905,1126634,1045843,1050437,1727252,1120801,997640,1104745,1125542,2666365,1131041,1120418,1078424,1062712,1067027) ORDER BY field (ArticleID,1304130,1055295,1132637,1066564,1121528,1067233,1124400,1065729,1127479,1050367,1133355,1051045,1073846,1095792,1109925,988905,1126634,1045843,1050437,1727252,1120801,997640,1104745,1125542,2666365,1131041,1120418,1078424,1062712,1067027)