为什么一有这么多读法

页面:/news/view-1528325/ | 耗时:0.8041 s | 内存:1.89 MB | 查询:4 | 缓存读取:4 写入:0 | 加载文件:23
select * from tbl_Articles WHERE ArticleID=1528325 LIMIT 0,1
select * from tbl_Articles_data WHERE ArticleID=1528325 LIMIT 0,1
select * from tbl_Articles_sphinx where id=1528325 LIMIT 0,1
SELECT ArticleID,Title FROM tbl_Articles WHERE ArticleID IN(849336,153274,2319773,1100741,1116351,1450616,412379,807709,592406,1112612,294941,3271419,2184838,1103600,1058705,1060433,1057253,1046959,1694991,1062538,340898,738383,1092266,1707178,265713,1101641,1101629,1078218,151615,1070672) ORDER BY field (ArticleID,849336,153274,2319773,1100741,1116351,1450616,412379,807709,592406,1112612,294941,3271419,2184838,1103600,1058705,1060433,1057253,1046959,1694991,1062538,340898,738383,1092266,1707178,265713,1101641,1101629,1078218,151615,1070672)