简述统计分组的作用简答题

页面:/news/view-175245/ | 耗时:0.7196 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=175245 LIMIT 0,1
select * from tbl_Articles_data WHERE ArticleID=175245 LIMIT 0,1
select * from tbl_Articles_sphinx where id=175245 LIMIT 0,1
SELECT ArticleID,Title FROM tbl_Articles WHERE ArticleID IN(1063329,1094817,1118505,1113762,1101629,1105029,1065928,1090232,1050051,1111130,1092367,1101847,1118096,1094661,1109799,1094387,1049836,1119007,1042815,1091735,1090260,1065495,1118699,1128901,1128081,1095257,1071972,1102022,1108522,1044569) ORDER BY field (ArticleID,1063329,1094817,1118505,1113762,1101629,1105029,1065928,1090232,1050051,1111130,1092367,1101847,1118096,1094661,1109799,1094387,1049836,1119007,1042815,1091735,1090260,1065495,1118699,1128901,1128081,1095257,1071972,1102022,1108522,1044569)