Mysql 无法为安装了应用程序但未在同一天卸载的用户提取“event_params.value.string_value”值

我的数据如下所示：

我已经写了一段代码来获取那些用户的伪id，他们在特定日期安装了应用程序，但没有在同一天卸载应用程序

这是：

    SELECT user_pseudo_id,
       MIN(CASE WHEN event_name = 'first_open' THEN TIMESTAMP_MICROS(event_timestamp) END) as app_install_date,
FROM `data-_179636122.events_20200917`
WHERE event_name IN ('app_remove', 'first_open')
AND TIMESTAMP_MICROS(user_first_touch_timestamp) > '2020-09-17 00:00:00' 
GROUP BY user_pseudo_id
HAVING COUNT(DISTINCT event_name) <> 2;

现在，对于这些用户\u伪\u id，我想提取事件\u params.value.string\u值，对于类似“screen\u view”的事件\u名称，我使用以下代码：

SELECT user_pseudo_id,
       MIN(CASE WHEN event_name = 'first_open' THEN TIMESTAMP_MICROS(event_timestamp) END) as app_install_date,
       MAX(CASE WHEN event_name = 'app_remove' THEN TIMESTAMP_MICROS(event_timestamp) END) as app_remove_date,
       param.value.string_value
FROM `data-_179636122.events_20200917`, unnest(event_params) as param
WHERE event_name IN ('app_remove', 'first_open')
AND TIMESTAMP_MICROS(user_first_touch_timestamp) > '2020-09-17 00:00:00' 
AND
param.key IN ('firebase_screen', 'firebase_screen_class', 'firebase_previous_class', 'firebase_previous_screen') 
GROUP BY user_pseudo_id, param.value.string_value
HAVING COUNT(DISTINCT event_name) <> 2;

但查询没有给出任何结果

预期产出：

在一列中，例如MainActivity、NowPlayingActivity等，将有重复的用户\u伪\u id和事件\u params.value.string\u值

如果你能指导我怎么做，我将不胜感激

感谢和问候， 山塔努贾因