-- 为 user_day_statistics 表添加字段
-- 执行日期: 2026-01-28
-- MySQL 8.0.23 兼容版本

USE media_manager;

-- 添加基础统计字段
ALTER TABLE user_day_statistics
ADD COLUMN play_count INT DEFAULT 0 COMMENT '播放数' AFTER works_count,
ADD COLUMN comment_count INT DEFAULT 0 COMMENT '评论数' AFTER play_count,
ADD COLUMN fans_increase INT DEFAULT 0 COMMENT '涨粉数' AFTER comment_count,
ADD COLUMN like_count INT DEFAULT 0 COMMENT '点赞数' AFTER fans_increase;

-- 添加字符串格式的统计字段
ALTER TABLE user_day_statistics
ADD COLUMN cover_click_rate VARCHAR(50) DEFAULT '0' COMMENT '封面点击率' AFTER like_count,
ADD COLUMN avg_watch_duration VARCHAR(50) DEFAULT '0' COMMENT '平均观看时长（秒）' AFTER cover_click_rate,
ADD COLUMN total_watch_duration VARCHAR(50) DEFAULT '0' COMMENT '观看总时长（秒）' AFTER avg_watch_duration,
ADD COLUMN completion_rate VARCHAR(50) DEFAULT '0' COMMENT '视频完播率' AFTER total_watch_duration;