小编Kat*_*ael的帖子

我的 T-SQL 代码低于我在 Pyspark 中转换的代码，但给了我错误

CASE
            WHEN time_on_site.eventaction = 'IN' AND time_on_site.next_action = 'OUT' AND time_on_site.timespent_sec < 72000 THEN 1  --  20 hours 
            WHEN time_on_site.eventaction = 'IN' AND time_on_site.next_action = 'OUT' AND time_on_site.timespent_sec >= 72000 THEN 0
            WHEN time_on_site.eventaction = 'IN' AND time_on_site.next_action = 'IN' AND time_on_site.timespent_sec <= 28800 THEN 2  -- 8 hours
            WHEN time_on_site.eventaction = 'IN' AND time_on_site.next_action = 'IN' AND time_on_site.timespent_sec > 28800 THEN 3
            WHEN time_on_site.type_flag = 'TYPE4' THEN 4
            ELSE NULL
         END AS "type"

下面是我的 …

我使用 substring 来获取第一个和最后一个值。但是如何在字符串中找到特定字符并在它之前/之后获取值