試圖結合2選擇語句

Question

我想結合這兩個語句，嘗試了很多在線搜索，但我只是flumoxed和嘗試各種組合似乎不工作（在Toad for Oracle）。

幫助！ （聲明一次做2到完成）

聲明1

select * 
from climate_trends.CT05_baseline_values 
    inner join climate_trends.CT03_grid_boxes 
     on climate_trends.CT05_baseline_values.location_id 
      = 
      climate_trends.CT03_grid_boxes.grid_box 

聲明2

select * 
from climate_trends.CT05_baseline_values 
where averaging_period_id in ('Spr','Sum','Aut','Win') 
     and climate_variable_id in('MeanTemp') 
     and location_type_id = 'Box' 
     and baseline_period = '1981-2010'; 

我現在已經添加了真正的價值，如果這使得更好的感覺？試圖讓一個單一的表，其中CT03保存空間參考我需要讓加盟...

Answer 1

我認爲你正在尋找一個UNION SELECT

select * from table5 
inner join table3 
on table5 = table3 
union 
select * from table5 
where column1 in ('A','B','C','D') 
    and column2 in('Variable1') 
    and column3 = 'Variable2' 
    and column4 = Variable3'; 

Answer 2

select * 
from table3 
join (select * from table5 
where column1 in ('A','B','C','D') 
    and column2 in('Variable1') 
    and column3 = 'Variable2' 
    and column4 = Variable3') tabke5 on table5 = table3 

Answer 3

似乎與statement 2你試圖過濾基於statement 1的結果。

如果它是正確的，然後只需添加過濾條件從statement 2到statement 1：

select * 
from climate_trends.CT05_baseline_values as baselines 
    inner join climate_trends.CT03_grid_boxes as boxes 
     on baselines.location_id = boxes.grid_box 
where 
    baselines.averaging_period_id in ('Spr','Sum','Aut','Win') 
    and 
    baselines.climate_variable_id in('MeanTemp') 
    and 
    baselines.location_type_id = 'Box' 
    and 
    baselines.baseline_period = '1981-2010'