两条线相交有多少个角

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select * from tbl_Articles WHERE ArticleID=1627333 LIMIT 0,1
select * from tbl_Articles_data WHERE ArticleID=1627333 LIMIT 0,1
select * from tbl_Articles_sphinx where id=1627333 LIMIT 0,1
SELECT ArticleID,Title FROM tbl_Articles WHERE ArticleID IN(2834780,1125964,1066066,1101873,1131912,1100905,1125005,1095151,1070796,1126583,2708404,2692418,1125067,1104533,1133371,1115485,1121666,1061578,1091442,1061798,3404585,1085582,1089684,1104043,1044306,1127807,1132509,1071691,1099375,1123078) ORDER BY field (ArticleID,2834780,1125964,1066066,1101873,1131912,1100905,1125005,1095151,1070796,1126583,2708404,2692418,1125067,1104533,1133371,1115485,1121666,1061578,1091442,1061798,3404585,1085582,1089684,1104043,1044306,1127807,1132509,1071691,1099375,1123078)