椭圆的参数方程怎么推导的？

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SELECT ArticleID,Title FROM tbl_Articles WHERE ArticleID IN(3089885,1128752,916866,935222,2052576,2021749,1551383,592740,1073127,828419,1079603,790658,1836770,409555,932890,583910,408450,1160188,1145767,1452135,1177589,703183,3126814,619833,2588004,501701,3520477,436960,1459937,1005873) ORDER BY field (ArticleID,3089885,1128752,916866,935222,2052576,2021749,1551383,592740,1073127,828419,1079603,790658,1836770,409555,932890,583910,408450,1160188,1145767,1452135,1177589,703183,3126814,619833,2588004,501701,3520477,436960,1459937,1005873)