平键分为哪三种

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select * from tbl_Articles WHERE ArticleID=2102989 LIMIT 0,1
select * from tbl_Articles_data WHERE ArticleID=2102989 LIMIT 0,1
select * from tbl_Articles_sphinx where id=2102989 LIMIT 0,1
SELECT ArticleID,Title FROM tbl_Articles WHERE ArticleID IN(366362,3007218,2791230,3127132,1129549,1120946,1985195,1099375,1475243,1127033,1927524,3213381,1129661,1956139,1583697,422566,835673,125203,2159159,2538871,3350083,943827,1502415,2763991,1121512,1125204,2222557,2177728,2573686,1082309) ORDER BY field (ArticleID,366362,3007218,2791230,3127132,1129549,1120946,1985195,1099375,1475243,1127033,1927524,3213381,1129661,1956139,1583697,422566,835673,125203,2159159,2538871,3350083,943827,1502415,2763991,1121512,1125204,2222557,2177728,2573686,1082309)