百分率怎么算

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SELECT ArticleID,Title FROM tbl_Articles WHERE ArticleID IN(489615,506595,360630,421515,541036,404019,539175,483094,436598,520383,451322,2365426,359868,845338,432066,491037,530885,535244,501135,86729,437948,524737,393570,617579,404988,410110,606768,363841,439794,197559) ORDER BY field (ArticleID,489615,506595,360630,421515,541036,404019,539175,483094,436598,520383,451322,2365426,359868,845338,432066,491037,530885,535244,501135,86729,437948,524737,393570,617579,404988,410110,606768,363841,439794,197559)