掉发的原因有什么

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select * from tbl_Articles WHERE ArticleID=487453 LIMIT 0,1
select * from tbl_Articles_data WHERE ArticleID=487453 LIMIT 0,1
select * from tbl_Articles_sphinx where id=487453 LIMIT 0,1
SELECT ArticleID,Title FROM tbl_Articles WHERE ArticleID IN(775071,694941,377839,1127069,712364,1074236,389803,652828,1092351,864202,530373,1089122,908490,791196,867759,737836,791256,538071,695213,1069077,850953,755625,863898,1072471,414438,1040406,770965,708090,3138901,358093) ORDER BY field (ArticleID,775071,694941,377839,1127069,712364,1074236,389803,652828,1092351,864202,530373,1089122,908490,791196,867759,737836,791256,538071,695213,1069077,850953,755625,863898,1072471,414438,1040406,770965,708090,3138901,358093)