单列类是什么意思

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select * from tbl_Articles_data WHERE ArticleID=394098 LIMIT 0,1
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SELECT ArticleID,Title FROM tbl_Articles WHERE ArticleID IN(430558,377611,498136,487036,1116187,469489,1111644,1093851,1116579,383885,473411,1098497,1112893,373685,161621,453335,1108662,393421,440431,450772,494633,415120,479256,2649053,1323305,497138,1102102,389539,378929,1108355) ORDER BY field (ArticleID,430558,377611,498136,487036,1116187,469489,1111644,1093851,1116579,383885,473411,1098497,1112893,373685,161621,453335,1108662,393421,440431,450772,494633,415120,479256,2649053,1323305,497138,1102102,389539,378929,1108355)