使然什么意思解释一下

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select * from tbl_Articles WHERE ArticleID=290864 LIMIT 0,1
select * from tbl_Articles_data WHERE ArticleID=290864 LIMIT 0,1
select * from tbl_Articles_sphinx where id=290864 LIMIT 0,1
SELECT ArticleID,Title FROM tbl_Articles WHERE ArticleID IN(1052013,1065085,994016,1125532,1049170,1117974,1410581,1095097,1645272,1117580,2063578,1444579,1129397,1128829,1086418,2244889,1107617,156284,1072591,1050301,1053404,1065533,1068532,1052121,1115535,1303469,1305165,1132833,1094911,1065091) ORDER BY field (ArticleID,1052013,1065085,994016,1125532,1049170,1117974,1410581,1095097,1645272,1117580,2063578,1444579,1129397,1128829,1086418,2244889,1107617,156284,1072591,1050301,1053404,1065533,1068532,1052121,1115535,1303469,1305165,1132833,1094911,1065091)