一个字节等于多少二进制数

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select * from tbl_Articles WHERE ArticleID=2470604 LIMIT 0,1
select * from tbl_Articles_data WHERE ArticleID=2470604 LIMIT 0,1
select * from tbl_Articles_sphinx where id=2470604 LIMIT 0,1
SELECT ArticleID,Title FROM tbl_Articles WHERE ArticleID IN(1298135,282460,718256,1276550,1097679,149270,339137,189939,1070722,297941,257619,513414,368044,302004,534489,926415,600373,1107094,344124,243360,443966,847995,1063151,411460,897118,1121004,638703,251307,960266,1126906) ORDER BY field (ArticleID,1298135,282460,718256,1276550,1097679,149270,339137,189939,1070722,297941,257619,513414,368044,302004,534489,926415,600373,1107094,344124,243360,443966,847995,1063151,411460,897118,1121004,638703,251307,960266,1126906)