与或非是什么意思

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select * from tbl_Articles WHERE ArticleID=879990 LIMIT 0,1
select * from tbl_Articles_data WHERE ArticleID=879990 LIMIT 0,1
select * from tbl_Articles_sphinx where id=879990 LIMIT 0,1
SELECT ArticleID,Title FROM tbl_Articles WHERE ArticleID IN(466637,449127,1094319,419031,3344627,1110245,430014,455627,1116553,471130,1305476,1087241,381865,2976915,2964226,369587,3447524,401504,399487,1081937,3266707,441885,450532,1110694,900134,417918,401765,399497,1121778,434882) ORDER BY field (ArticleID,466637,449127,1094319,419031,3344627,1110245,430014,455627,1116553,471130,1305476,1087241,381865,2976915,2964226,369587,3447524,401504,399487,1081937,3266707,441885,450532,1110694,900134,417918,401765,399497,1121778,434882)