合併兩個表

Question

我有2個表

表1的數據，它有列

id 
sdate 
type 

類型列可以有2級值的事件或時間表我使用這個查詢來獲取事件總數的結果， scheudle

select date_format(sdate, '%m-%d-%Y') as sdate, sum(type ='event') as tevent , sum(type='schedule') as tschedule from table1 where sid ='1' group by (sdate); 

表2具有這些列

id 
title 
dtime 

，使他們既類似於工會使用我做了這樣的事情

select date_format(dtime, '%m-%d-%Y') as sdate ,0 as tevent,0 as tschedule,count(id) as tlog from table2 where sid =1 group by (sdate) ; 

我有點迷惑，我怎麼能在某種程度上得到兩個表中的數據，如果日期是相同的，應該告訴我數據在一列中。

Answer 1

嘗試此（包括原始查詢的某些校正）：

select sdate, sum(tevent) as tevent, 
sum(tschedule) as tschedule, sum(tlog) as tlog 
from (
select date_format(sdate, '%m-%d-%Y') as sdate, 
sum(type='event') as tevent , 
sum(type='schedule') as tschedule, 
0 as tlog from table1 
group by sdate 
union 
select date_format(dtime, '%m-%d-%Y') as sdate , 
0 as tevent,0 as tschedule, 
count(id) as tlog from table2 
group by sdate 
) s group by sdate;