dwd_dim_user_info_his

insert overwrite table dwd_dim_user_info_his_tmp 
select 
    * 
from 
(
    select 
        id, 
        name, 
        birthday, 
        gender, 
        email,
        user_level, 
        create_time, 
        operate_time, 
        ‘2020-03-11‘ start_date, 
        ‘9999-99-99‘ end_date 
    from ods_user_info 
    where dt=‘2020-03-11‘ 
    
    -- 找出最新信息，并拼接修改后的旧信息
    union all 
    select 
        uh.id, 
        uh.name, 
        uh.birthday, 
        uh.gender, 
        uh.email, 
        uh.user_level, 
        uh.create_time, 
        uh.operate_time, 
        uh.start_date, 
        -- 与最新数据join ,找出要修改的旧信息，将其期限进行修改
        if(ui.id is not null and uh.end_date=‘9999-99-99‘, date_add(ui.dt,-1), uh.end_date) end_date 
    from dwd_dim_user_info_his uh 
    left join 
    ( 
        select 
            * 
        from ods_user_info 
        where dt=‘2020-03-11‘ 
    ) ui 
    on uh.id=ui.id 
)his 
order by his.id, start_date;

insert overwrite table dwd_dim_user_info_his 
select * from dwd_dim_user_info_his_tmp;