冲量的单位是什么

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select * from tbl_Articles WHERE ArticleID=490959 LIMIT 0,1
select * from tbl_Articles_data WHERE ArticleID=490959 LIMIT 0,1
SELECT * FROM tbl_categories where CategoryID=90022 LIMIT 0,1
select * from tbl_Articles_sphinx where id=490959 LIMIT 0,1
SELECT ArticleID,Title FROM tbl_Articles WHERE ArticleID IN(2297655,1609759,1203599,2862804,800779,420842,3459926,2078414,1144034,691361,396276,89161,840813,3372145,411831,469791,709216,1158243,418291,713103,788804,3524054,854423,741156,803423,3135066,1027564,1844058,1152870,1158086) ORDER BY field (ArticleID,2297655,1609759,1203599,2862804,800779,420842,3459926,2078414,1144034,691361,396276,89161,840813,3372145,411831,469791,709216,1158243,418291,713103,788804,3524054,854423,741156,803423,3135066,1027564,1844058,1152870,1158086)