r5和i5有什么区别在哪

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select * from tbl_Articles WHERE ArticleID=2583301 LIMIT 0,1
select * from tbl_Articles_data WHERE ArticleID=2583301 LIMIT 0,1
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SELECT ArticleID,Title FROM tbl_Articles WHERE ArticleID IN(1129221,1056514,1540021,1045057,1093951,1067487,1068212,1100537,1064553,1068150,1045051,1050025,1048788,1061832,1092115,1065083,1045471,1131063,1133399,1063671,1062530,1062252,1062488,1103841,1050959,1066438,1054792,1091693,1085882,1049716) ORDER BY field (ArticleID,1129221,1056514,1540021,1045057,1093951,1067487,1068212,1100537,1064553,1068150,1045051,1050025,1048788,1061832,1092115,1065083,1045471,1131063,1133399,1063671,1062530,1062252,1062488,1103841,1050959,1066438,1054792,1091693,1085882,1049716)