保留三位有效数字什么意思

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select * from tbl_Articles WHERE ArticleID=1112629 LIMIT 0,1
select * from tbl_Articles_data WHERE ArticleID=1112629 LIMIT 0,1
select * from tbl_Articles_sphinx where id=1112629 LIMIT 0,1
SELECT ArticleID,Title FROM tbl_Articles WHERE ArticleID IN(3152059,425587,436054,2808080,376514,389947,1101311,419863,419980,363099,428753,427719,86796,401597,385533,395901,100935,1112554,461053,401352,458109,404857,365436,377075,1112832,1107475,394672,1098875,388179,376211) ORDER BY field (ArticleID,3152059,425587,436054,2808080,376514,389947,1101311,419863,419980,363099,428753,427719,86796,401597,385533,395901,100935,1112554,461053,401352,458109,404857,365436,377075,1112832,1107475,394672,1098875,388179,376211)