什么叫对称矩阵

页面:/news/view-2663409/ | 耗时:0.5885 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=2663409 LIMIT 0,1
select * from tbl_Articles_data WHERE ArticleID=2663409 LIMIT 0,1
select * from tbl_Articles_sphinx where id=2663409 LIMIT 0,1
SELECT ArticleID,Title FROM tbl_Articles WHERE ArticleID IN(863149,1237527,86785,926398,3108556,362703,367259,839702,1117924,3429293,3456209,86839,86756,1110299,931500,1082483,359406,2573605,2018490,1085532,373665,365250,100491,1602585,3515801,1182479,80100,386199,651986,2258714) ORDER BY field (ArticleID,863149,1237527,86785,926398,3108556,362703,367259,839702,1117924,3429293,3456209,86839,86756,1110299,931500,1082483,359406,2573605,2018490,1085532,373665,365250,100491,1602585,3515801,1182479,80100,386199,651986,2258714)