我想從5列有一列名爲「UP」的總和

Question

我有5個表（bepd，tirpd，elpd，frpd，kopd）與同名列「Up」列，我想使從所有表中總結並顯示在一個php代碼中。誰能幫我 ？

Answer 1

select sum(SumUp) 
from (
     select sum(up) as SumUp 
     from Table1 
     union all 
     select sum(up) 
     from Table2 
     union all 
     select sum(up) 
     from Table3 
     union all 
     ... 
     ) SubQueryAlias