INSERT INTO user_behavior (user_id, product_id, behavior_type, score) VALUES (#{userId}, #{productId}, #{behaviorType}, #{score}) SELECT * FROM user_behavior WHERE user_id = #{userId} ORDER BY create_time DESC SELECT * FROM user_behavior WHERE product_id = #{productId} ORDER BY create_time DESC SELECT * FROM user_behavior WHERE user_id = #{userId} AND product_id = #{productId} AND behavior_type = #{behaviorType} LIMIT 1 UPDATE user_behavior SET score = #{score}, create_time = NOW() WHERE id = #{id} SELECT DISTINCT product_id FROM user_behavior WHERE user_id = #{userId} SELECT DISTINCT user_id FROM user_behavior WHERE product_id = #{productId} SELECT u.id as userId, u.username, u.name, COUNT(ub.id) as viewCount, MAX(ub.create_time) as lastViewTime FROM user_behavior ub INNER JOIN user u ON ub.user_id = u.id INNER JOIN product p ON ub.product_id = p.id WHERE ub.behavior_type = 'VIEW' AND p.merchant_id = #{merchantId} AND ub.create_time >= DATE_SUB(NOW(), INTERVAL #{days} DAY) GROUP BY u.id, u.username, u.name ORDER BY lastViewTime DESC