Question

我想显示两个不同表的值，以及该表中两个不同的列，按升序排序。

我该怎么做？

我用它来显示两个表的值，但是按升序排序：

select 
  distinct varWinePrice 
from 
  tbl_wines 
union 
select 
  distinct varPrice 
from 
  tbl_price

Answer 1

如果列名不同，则应使用第一个子选择的列进行排序：

select distinct varWinePrice 
from `tbl_wines` 
union 
select distinct varPrice 
from tbl_price
order by varWinePrice

Answer 2

select distinct varWinePrice as x from tbl_wines union
select distinct varPrice as x from tbl_price
order by x asc;

Answer 3

您可以将UNION选择嵌套到外部选择

中

select
  pr.price
from (
  select 
    distinct varWinePrice 
  from 
    tbl_wines 
  union 
  select 
    distinct varPrice 
  from 
    tbl_price
) pr
order by
  pr.price

Answer 4

您可以使用临时表按语法使用顺序：
1）创建临时表
2）在临时表中填写记录
3）通过应用order by clause

从临时表中获取行

Answer 5

SELECT Price
FROM ( SELECT DISTINCT varWinePrice AS Price FROM tbl_wines 
       UNION
       SELECT distinct varPrice AS Price FROM tbl_price
     )
ORDER BY Price

5 个答案: