什么是正态分布

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select * from tbl_Articles WHERE ArticleID=766861 LIMIT 0,1
select * from tbl_Articles_data WHERE ArticleID=766861 LIMIT 0,1
select * from tbl_Articles_sphinx where id=766861 LIMIT 0,1
SELECT ArticleID,Title FROM tbl_Articles WHERE ArticleID IN(1146687,860473,509824,727456,2650372,1085200,1114256,1114310,447313,1577885,424836,710182,1107216,1091389,643297,667511,1859395,380003,1097945,2653676,1107491,1052022,1092862,1114190,1081931,1121988,1727643,1110714,1117401,3080047) ORDER BY field (ArticleID,1146687,860473,509824,727456,2650372,1085200,1114256,1114310,447313,1577885,424836,710182,1107216,1091389,643297,667511,1859395,380003,1097945,2653676,1107491,1052022,1092862,1114190,1081931,1121988,1727643,1110714,1117401,3080047)