实数有哪些运算法则

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select * from tbl_Articles WHERE ArticleID=3463027 LIMIT 0,1
select * from tbl_Articles_data WHERE ArticleID=3463027 LIMIT 0,1
select * from tbl_Articles_sphinx where id=3463027 LIMIT 0,1
SELECT ArticleID,Title FROM tbl_Articles WHERE ArticleID IN(611608,850961,872086,81198,874165,486289,979937,504651,595816,823823,859152,549886,895899,1037355,683291,1107475,852130,463215,722832,934056,1104637,1002457,825899,627831,477533,990267,370777,506004,918387,386802) ORDER BY field (ArticleID,611608,850961,872086,81198,874165,486289,979937,504651,595816,823823,859152,549886,895899,1037355,683291,1107475,852130,463215,722832,934056,1104637,1002457,825899,627831,477533,990267,370777,506004,918387,386802)