如何理解说明文下定义

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select * from tbl_Articles WHERE ArticleID=2204607 LIMIT 0,1
select * from tbl_Articles_data WHERE ArticleID=2204607 LIMIT 0,1
select * from tbl_Articles_sphinx where id=2204607 LIMIT 0,1
SELECT ArticleID,Title FROM tbl_Articles WHERE ArticleID IN(1080787,772318,266178,1524045,585298,247384,1063395,1494519,1092752,1064645,1066925,1050207,1075967,417729,1500032,483833,121961,1556748,1041531,1090396,533054,212334,2088471,432235,1367536,1528187,254861,1076868,1504727,1094619) ORDER BY field (ArticleID,1080787,772318,266178,1524045,585298,247384,1063395,1494519,1092752,1064645,1066925,1050207,1075967,417729,1500032,483833,121961,1556748,1041531,1090396,533054,212334,2088471,432235,1367536,1528187,254861,1076868,1504727,1094619)