-- -- 创建学习报告表
-- CREATE TABLE study_report (
--     report_id BIGINT PRIMARY KEY AUTO_INCREMENT COMMENT '报告ID',
--     goal_id BIGINT NOT NULL COMMENT '目标ID',
--     user_id BIGINT NOT NULL COMMENT '用户ID',
--     generate_time TIMESTAMP DEFAULT CURRENT_TIMESTAMP COMMENT '生成时间',
--     accuracy DECIMAL(5,2) COMMENT '正确率',
--     total_duration INT COMMENT '总共用时(秒)',
--     knowledge_analysis JSON COMMENT '知识点分析',
--     difficulty_analysis JSON COMMENT '难度分析',
--     FOREIGN KEY (goal_id) REFERENCES goals(goal_id),
--     FOREIGN KEY (user_id) REFERENCES user_info(user_id)
-- ) COMMENT='学习报告表';