解释一下十八相送的意思

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select * from tbl_Articles WHERE ArticleID=976273 LIMIT 0,1
select * from tbl_Articles_data WHERE ArticleID=976273 LIMIT 0,1
select * from tbl_Articles_sphinx where id=976273 LIMIT 0,1
SELECT ArticleID,Title FROM tbl_Articles WHERE ArticleID IN(1089239,483948,403707,366787,532707,474726,1104675,414310,381207,3509114,398417,394973,482218,3408432,455853,361799,1038168,427981,1105237,101121,1095145,375082,554083,409195,710284,489705,428375,1119694,394214,1116187) ORDER BY field (ArticleID,1089239,483948,403707,366787,532707,474726,1104675,414310,381207,3509114,398417,394973,482218,3408432,455853,361799,1038168,427981,1105237,101121,1095145,375082,554083,409195,710284,489705,428375,1119694,394214,1116187)