方差怎么算

页面:/news/view-1660147/ | 耗时:0.7170 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=1660147 LIMIT 0,1
select * from tbl_Articles_data WHERE ArticleID=1660147 LIMIT 0,1
select * from tbl_Articles_sphinx where id=1660147 LIMIT 0,1
SELECT ArticleID,Title FROM tbl_Articles WHERE ArticleID IN(606768,451322,529755,509503,676505,1129262,482092,1104491,374233,397411,3307559,367925,438337,507674,406503,209362,403531,234847,389273,258159,517094,464944,1104625,469173,480872,512646,389705,373243,626536,444908) ORDER BY field (ArticleID,606768,451322,529755,509503,676505,1129262,482092,1104491,374233,397411,3307559,367925,438337,507674,406503,209362,403531,234847,389273,258159,517094,464944,1104625,469173,480872,512646,389705,373243,626536,444908)