电表为什么会快

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select * from tbl_Articles WHERE ArticleID=2120963 LIMIT 0,1
select * from tbl_Articles_data WHERE ArticleID=2120963 LIMIT 0,1
select * from tbl_Articles_sphinx where id=2120963 LIMIT 0,1
SELECT ArticleID,Title FROM tbl_Articles WHERE ArticleID IN(506015,638063,476924,707379,1080835,502897,231317,195040,450637,1098545,1129775,401257,624235,1117766,237728,176746,1069395,1096737,884031,210506,338451,686444,1930766,1110974,139923,146605,920943,635993,1106775,1073899) ORDER BY field (ArticleID,506015,638063,476924,707379,1080835,502897,231317,195040,450637,1098545,1129775,401257,624235,1117766,237728,176746,1069395,1096737,884031,210506,338451,686444,1930766,1110974,139923,146605,920943,635993,1106775,1073899)