请各位周知是什么意思

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select * from tbl_Articles WHERE ArticleID=1617291 LIMIT 0,1
select * from tbl_Articles_data WHERE ArticleID=1617291 LIMIT 0,1
select * from tbl_Articles_sphinx where id=1617291 LIMIT 0,1
SELECT ArticleID,Title FROM tbl_Articles WHERE ArticleID IN(1126660,1540021,1092308,2735852,1328815,1528066,983947,2642645,1042893,1121170,1275345,2640560,1326812,1301254,1089842,1086608,1083249,1731318,981848,1604244,1068782,1071697,1500069,1608175,1056858,1053786,2614678,1345992,2130137,1573658) ORDER BY field (ArticleID,1126660,1540021,1092308,2735852,1328815,1528066,983947,2642645,1042893,1121170,1275345,2640560,1326812,1301254,1089842,1086608,1083249,1731318,981848,1604244,1068782,1071697,1500069,1608175,1056858,1053786,2614678,1345992,2130137,1573658)