什么叫预埋单

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select * from tbl_Articles WHERE ArticleID=446899 LIMIT 0,1
select * from tbl_Articles_data WHERE ArticleID=446899 LIMIT 0,1
select * from tbl_Articles_sphinx where id=446899 LIMIT 0,1
SELECT ArticleID,Title FROM tbl_Articles WHERE ArticleID IN(86218,1116187,1094112,100380,1087769,1103406,1106416,86252,644346,2675514,3362461,1099933,100672,460342,1111356,1108908,362940,86003,1116097,2709651,100477,1087595,1060878,1119852,2738634,86259,3130924,1092862,362039,86231) ORDER BY field (ArticleID,86218,1116187,1094112,100380,1087769,1103406,1106416,86252,644346,2675514,3362461,1099933,100672,460342,1111356,1108908,362940,86003,1116097,2709651,100477,1087595,1060878,1119852,2738634,86259,3130924,1092862,362039,86231)