一个梯形中最多有几个直角

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select * from tbl_Articles WHERE ArticleID=1568157 LIMIT 0,1
select * from tbl_Articles_data WHERE ArticleID=1568157 LIMIT 0,1
select * from tbl_Articles_sphinx where id=1568157 LIMIT 0,1
SELECT ArticleID,Title FROM tbl_Articles WHERE ArticleID IN(1127039,1128751,1115913,1059398,1098645,1085740,1056202,1085114,1079368,1100430,1105231,1127990,1070254,1089820,1122294,1104591,1126072,1106124,1063021,1125964,1069889,1120542,1121252,1067473,1061554,1081297,1071197,1113209,1085854,1062116) ORDER BY field (ArticleID,1127039,1128751,1115913,1059398,1098645,1085740,1056202,1085114,1079368,1100430,1105231,1127990,1070254,1089820,1122294,1104591,1126072,1106124,1063021,1125964,1069889,1120542,1121252,1067473,1061554,1081297,1071197,1113209,1085854,1062116)