1加i的绝对值为啥等于根号下2

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select * from tbl_Articles WHERE ArticleID=466289 LIMIT 0,1
select * from tbl_Articles_data WHERE ArticleID=466289 LIMIT 0,1
select * from tbl_Articles_sphinx where id=466289 LIMIT 0,1
SELECT ArticleID,Title FROM tbl_Articles WHERE ArticleID IN(1195129,739831,800091,418333,1061681,1800392,1183673,1048259,1398166,1132018,940877,2182194,1322079,1836452,1037359,2812130,543080,1414185,675437,517541,2258708,2102776,1079693,1088111,406281,610345,748873,1752240,3068447,1841325) ORDER BY field (ArticleID,1195129,739831,800091,418333,1061681,1800392,1183673,1048259,1398166,1132018,940877,2182194,1322079,1836452,1037359,2812130,543080,1414185,675437,517541,2258708,2102776,1079693,1088111,406281,610345,748873,1752240,3068447,1841325)