Question

我正在尝试将这两个语句结合起来，在网上尝试了很多搜索，但我只是在运行并尝试了各种组合似乎不起作用（在Toad for Oracle中）。

帮助！

声明1（完成一次声明2）

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

声明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';

如果这更有意义，我现在已经添加了实际值？试图获得一个单独的表，其中CT03保存空间参考，我需要将连接转换为...

Answer 1

我认为您正在寻找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statement 2您尝试过滤statement 1后得到的基线。

如果它是正确的，那么只需将statement 2的过滤条件添加到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'

试图结合2个选择语句

3 个答案: