何为反约分

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select * from tbl_Articles WHERE ArticleID=2305161 LIMIT 0,1
select * from tbl_Articles_data WHERE ArticleID=2305161 LIMIT 0,1
select * from tbl_Articles_sphinx where id=2305161 LIMIT 0,1
SELECT ArticleID,Title FROM tbl_Articles WHERE ArticleID IN(151251,144279,141949,177436,164074,164710,131907,3270614,154583,137364,110389,2246826,152817,175635,127448,171486,1551577,117291,140583,145370,159210,156448,131009,168564,2368939,141061,139461,158305,178115,137248) ORDER BY field (ArticleID,151251,144279,141949,177436,164074,164710,131907,3270614,154583,137364,110389,2246826,152817,175635,127448,171486,1551577,117291,140583,145370,159210,156448,131009,168564,2368939,141061,139461,158305,178115,137248)