而表修饰是什么意思

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select * from tbl_Articles WHERE ArticleID=228304 LIMIT 0,1
select * from tbl_Articles_data WHERE ArticleID=228304 LIMIT 0,1
select * from tbl_Articles_sphinx where id=228304 LIMIT 0,1
SELECT ArticleID,Title FROM tbl_Articles WHERE ArticleID IN(1044867,1044382,1477985,1547257,1783505,1069739,1875022,1065399,2379899,1091900,1046706,1062424,1076111,1080695,1077026,2340426,1078414,1052599,1057770,1057178,1089560,1048622,2546731,1070650,1481519,1861729,2322113,1061534,1090424,1356612) ORDER BY field (ArticleID,1044867,1044382,1477985,1547257,1783505,1069739,1875022,1065399,2379899,1091900,1046706,1062424,1076111,1080695,1077026,2340426,1078414,1052599,1057770,1057178,1089560,1048622,2546731,1070650,1481519,1861729,2322113,1061534,1090424,1356612)