单调不减什么意思

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select * from tbl_Articles WHERE ArticleID=3503115 LIMIT 0,1
select * from tbl_Articles_data WHERE ArticleID=3503115 LIMIT 0,1
select * from tbl_Articles_sphinx where id=3503115 LIMIT 0,1
SELECT ArticleID,Title FROM tbl_Articles WHERE ArticleID IN(385533,1116031,1585218,400522,780962,3338826,982022,365728,770003,1120348,1089239,363495,2117700,1134207,1110224,1120896,1119920,1087747,458257,2855263,398319,387272,2749646,3390725,1102570,528370,378108,100935,1963536,1177043) ORDER BY field (ArticleID,385533,1116031,1585218,400522,780962,3338826,982022,365728,770003,1120348,1089239,363495,2117700,1134207,1110224,1120896,1119920,1087747,458257,2855263,398319,387272,2749646,3390725,1102570,528370,378108,100935,1963536,1177043)