一元一次不等式组是什么

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select * from tbl_Articles WHERE ArticleID=363881 LIMIT 0,1
select * from tbl_Articles_data WHERE ArticleID=363881 LIMIT 0,1
select * from tbl_Articles_sphinx where id=363881 LIMIT 0,1
SELECT ArticleID,Title FROM tbl_Articles WHERE ArticleID IN(1119694,1895044,2618210,1118012,678790,1091705,1089168,1121988,895567,869426,537482,538892,1120364,1304475,366843,1090438,1745458,605764,1121928,1114676,1110650,417730,1102750,661382,707399,1101099,1099723,1847464,1912295,1640850) ORDER BY field (ArticleID,1119694,1895044,2618210,1118012,678790,1091705,1089168,1121988,895567,869426,537482,538892,1120364,1304475,366843,1090438,1745458,605764,1121928,1114676,1110650,417730,1102750,661382,707399,1101099,1099723,1847464,1912295,1640850)