update set from 語句用法 delete 多表刪除的使用 以及異常：table name "temp_new_tel" specified more than once

推薦網址：https://www.cnblogs.com/ShaYeBlog/p/10893963.html

下面這兩條sql語句的效果是一樣的

update t_score_grent aa
set usable_score=aa.usable_score + bb.pay_score
from (
         select score_grent_id, pay_score from t_score_settel_detail where score_settel_id = '77'
     ) bb
where aa.score_grent_id::varchar = bb.score_grent_id
  and exists(
        select 1
        from t_score_settel_detail
        where aa.score_grent_id::varchar = score_grent_id
          and score_settel_id = '77'
    )


update t_score_grent
set usable_score=aa.usable_score + tssd.pay_score
from t_score_grent aa
         left join t_score_settel_detail tssd on aa.score_grent_id::varchar = tssd.score_grent_id
where tssd.score_settel_id = '0';
delete 多表刪除的使用：https://blog.csdn.net/hevenue/article/details/70264356

 以及異常：table name "temp_new_tel" specified more than once解決辦法：
https://blog.csdn.net/qq_22310551/article/details/83181241
將更新sql改成這樣就可以了

delete from temp_new_tel  using temp_tel where temp_new_tel.telphone=temp_tel.telphone;