vertica时间计算SQL语句实例：统计一天内登录的用户
时间：2022-03-10 17:26
SQL语句实例：
select count(id) as num from public.user where cast((CURRENT_TIMESTAMP-login_timed) day as integer )<=1;
或
select count(id) as num from public.user where cast((CURRENT_TIMESTAMP-login_timed) hour as integer )<=24;
大家可以根据表结构稍作调整后使用
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