sql - 从联合声明中删除默认顺序

Question

我想显示这样的数据：

Column1        Column2
-----------------------
TotalAvg         60%

A1               50%

B1               70%

Z1               60%

我的 sql 脚本类似于：

select 'Total Avg' as Column1,'60%' as Column2

union

select Column1,Column2 from tblAvg

我得到的结果是这样的：

Column1        Column2
------------------------

A1               50%

B1               70%

TotalAvg         60%

Z1               60%

问题：我想删除默认排序并希望得到我们正在执行联合表的顺序。

Answer 1

您可以添加一个指定结果顺序的列：

select 'Total Avg' as Column1,'60%' as Column2, 1 as OrderCol
union
select Column1,Column2, 2 from tblAvg
order by OrderCol

如果没有order by，数据库可以自由地以任何顺序返回行。

Answer 2

SELECT
  *
FROM
(
  select 0 as pos, 'Total Avg' as Column1, '60%' as Column2
  union
  select 1 as pos,                Column1,          Column2 from tblAvg 
)
  AS data
ORDER BY
  pos, column1, column2

Answer 3

你可以做这样的事情

select * From
(
select 'Total Avg' as Column1,'60%' as Column2, 1 as ItemOrder

union

select Column1,Column2,2 from tblAvg
) innertable
Order By ItemOrder

Answer 4

尝试使用

select 'Total Avg' as Column1,'60%' as Column2

union all

select Column1,Column2 from tblAvg