k和m代表什么数量单位

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select * from tbl_Articles WHERE ArticleID=2400291 LIMIT 0,1
select * from tbl_Articles_data WHERE ArticleID=2400291 LIMIT 0,1
select * from tbl_Articles_sphinx where id=2400291 LIMIT 0,1
SELECT ArticleID,Title FROM tbl_Articles WHERE ArticleID IN(1067129,513593,402093,1171692,601414,1119373,1066022,1065345,1525651,549612,397788,981885,597211,554269,1076468,1092940,600471,499327,382074,2412798,539215,1107843,510361,1089253,1332596,3186137,580364,434626,385237,394083) ORDER BY field (ArticleID,1067129,513593,402093,1171692,601414,1119373,1066022,1065345,1525651,549612,397788,981885,597211,554269,1076468,1092940,600471,499327,382074,2412798,539215,1107843,510361,1089253,1332596,3186137,580364,434626,385237,394083)