画一条直线的垂线可以画多少条

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select * from tbl_Articles WHERE ArticleID=1824643 LIMIT 0,1
select * from tbl_Articles_data WHERE ArticleID=1824643 LIMIT 0,1
select * from tbl_Articles_sphinx where id=1824643 LIMIT 0,1
SELECT ArticleID,Title FROM tbl_Articles WHERE ArticleID IN(1042943,1086019,1092387,1104635,982939,1049836,1081195,1048360,1074232,1069729,1069223,1045386,1304063,1065583,1096989,1071243,1042995,1076868,964762,1049542,1071239,1106793,1088431,1077348,1067207,1071119,1064697,1082804,1093987,1074880) ORDER BY field (ArticleID,1042943,1086019,1092387,1104635,982939,1049836,1081195,1048360,1074232,1069729,1069223,1045386,1304063,1065583,1096989,1071243,1042995,1076868,964762,1049542,1071239,1106793,1088431,1077348,1067207,1071119,1064697,1082804,1093987,1074880)