什么叫做比例?比例的基本性质是什么?

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select * from tbl_Articles WHERE ArticleID=1144331 LIMIT 0,1
select * from tbl_Articles_data WHERE ArticleID=1144331 LIMIT 0,1
select * from tbl_Articles_sphinx where id=1144331 LIMIT 0,1
SELECT ArticleID,Title FROM tbl_Articles WHERE ArticleID IN(2264478,1368703,1081495,394428,613412,1457340,808208,1058166,1109076,413242,2308637,1144759,587291,589527,1378921,2264283,735709,968645,2241675,379279,2316923,3012244,87702,656471,689591,950476,476762,949737,829554,3508446) ORDER BY field (ArticleID,2264478,1368703,1081495,394428,613412,1457340,808208,1058166,1109076,413242,2308637,1144759,587291,589527,1378921,2264283,735709,968645,2241675,379279,2316923,3012244,87702,656471,689591,950476,476762,949737,829554,3508446)