举例说明什么是物理性质

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select * from tbl_Articles WHERE ArticleID=2512615 LIMIT 0,1
select * from tbl_Articles_data WHERE ArticleID=2512615 LIMIT 0,1
select * from tbl_Articles_sphinx where id=2512615 LIMIT 0,1
SELECT ArticleID,Title FROM tbl_Articles WHERE ArticleID IN(1095992,1097147,1091123,1075901,1114496,1088926,1046706,1054792,1074630,1067769,1079840,1079942,1118040,1096807,1088431,1077826,1068150,1085114,1107567,1075777,1087893,1062670,996794,1094987,1067027,1049548,1070934,997640,1064345,1101921) ORDER BY field (ArticleID,1095992,1097147,1091123,1075901,1114496,1088926,1046706,1054792,1074630,1067769,1079840,1079942,1118040,1096807,1088431,1077826,1068150,1085114,1107567,1075777,1087893,1062670,996794,1094987,1067027,1049548,1070934,997640,1064345,1101921)