一个景点attraction一个类型表type一个关联表relation给出sql语句查询所有的信息
SELECT * FROM attraction AS a JOIN relation AS r ON a.id = r.attraction_id JOIN type AS t ON r.type_id = t.id;
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SELECT * FROM attraction AS a JOIN relation AS r ON a.id = r.attraction_id JOIN type AS t ON r.type_id = t.id;
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