直线y=1的斜率是多少

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select * from tbl_Articles WHERE ArticleID=3414336 LIMIT 0,1
select * from tbl_Articles_data WHERE ArticleID=3414336 LIMIT 0,1
select * from tbl_Articles_sphinx where id=3414336 LIMIT 0,1
SELECT ArticleID,Title FROM tbl_Articles WHERE ArticleID IN(648159,3382652,628221,577063,546796,514817,3502934,3026769,642386,782444,566459,3354285,3245284,574548,3444991,3074389,471098,3366355,3520477,511786,2078414,3421594,3210861,376159,453999,3449366,390447,1350857,2277395,766126) ORDER BY field (ArticleID,648159,3382652,628221,577063,546796,514817,3502934,3026769,642386,782444,566459,3354285,3245284,574548,3444991,3074389,471098,3366355,3520477,511786,2078414,3421594,3210861,376159,453999,3449366,390447,1350857,2277395,766126)