什么是运算器?它的主要由哪几个功能部件组成?

页面:/news/view-704049/ | 耗时:0.4485 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=704049 LIMIT 0,1
select * from tbl_Articles_data WHERE ArticleID=704049 LIMIT 0,1
select * from tbl_Articles_sphinx where id=704049 LIMIT 0,1
SELECT ArticleID,Title FROM tbl_Articles WHERE ArticleID IN(1791895,459954,585461,438393,3419980,1189251,680606,1018370,1210734,3497361,96273,1701862,1002442,3132811,837914,385099,1117857,3496794,3194979,955851,506751,1333583,3427512,875764,793243,584280,1339196,754983,622034,1124724) ORDER BY field (ArticleID,1791895,459954,585461,438393,3419980,1189251,680606,1018370,1210734,3497361,96273,1701862,1002442,3132811,837914,385099,1117857,3496794,3194979,955851,506751,1333583,3427512,875764,793243,584280,1339196,754983,622034,1124724)