第一顺位是什么意思

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select * from tbl_Articles_data WHERE ArticleID=583371 LIMIT 0,1
select * from tbl_Articles_sphinx where id=583371 LIMIT 0,1
SELECT ArticleID,Title FROM tbl_Articles WHERE ArticleID IN(3088594,3085501,1951734,801082,3524145,1056040,1080434,844790,1079636,581481,1196474,3505904,1082387,507891,844548,501909,2717576,3360098,884398,889089,3385186,1079309,1486843,1104990,3059780,1090314,3366541,2386539,1044546,1975441) ORDER BY field (ArticleID,3088594,3085501,1951734,801082,3524145,1056040,1080434,844790,1079636,581481,1196474,3505904,1082387,507891,844548,501909,2717576,3360098,884398,889089,3385186,1079309,1486843,1104990,3059780,1090314,3366541,2386539,1044546,1975441)