什么是关系代数

页面:/news/view-166233/ | 耗时:0.3942 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=166233 LIMIT 0,1
select * from tbl_Articles_data WHERE ArticleID=166233 LIMIT 0,1
select * from tbl_Articles_sphinx where id=166233 LIMIT 0,1
SELECT ArticleID,Title FROM tbl_Articles WHERE ArticleID IN(1128337,1110576,1073588,1077525,1076732,1061928,1093857,1126366,1078595,1099175,1063619,1054358,1110516,1076267,1091974,1072050,1091889,1051683,1104195,1063329,1073822,1076537,1062392,1074340,1063191,1090032,1499751,1088774,1087579,1097047) ORDER BY field (ArticleID,1128337,1110576,1073588,1077525,1076732,1061928,1093857,1126366,1078595,1099175,1063619,1054358,1110516,1076267,1091974,1072050,1091889,1051683,1104195,1063329,1073822,1076537,1062392,1074340,1063191,1090032,1499751,1088774,1087579,1097047)