使表的聯合顯示，以便它們應用

我已經寫了一個SQL Server查詢，它返回幾個選擇語句的聯合。查詢按照我的預期返回數據。使表的聯合顯示，以便它們應用

但它正在做的一件意想不到的事情是它按字母順序對數據進行排序。但是，我想要的是第一個表的數據應該出現在最前面，第二個表的數據應該出現在第二個等等。

有人可以幫我嗎？

select employeename from employeetable where employeename like 'vik%' 
union 
select employeename from employeetable where employeename like '% vik%' 
union 
select employeename from EmployeeTable where employeename like '%vik%' and 
              employeename not like 'vik%' and 
              employeename not like '% vik%'

來源

2016-08-01 braceyourself

加1到第一選擇，2秒等 – jarlh

@jarlh可能演變爲任何東西：請你分享示例 – braceyourself

'select 1 as ord，employeenable from employeetable ... order by ord'。 – jarlh

你可以做到這一點沒有union：

select employeename 
from employeetable 
where employeename like '%vik%' 
order by (case when employeename like 'vik%' then 1 
       when employeename like '% vik%' then 2 
       else 3 
      end);

如果你能在employeetable複製employeename S，那麼你可以使用group by刪除重複：

select employeename 
from employeetable 
where employeename like '%vik%' 
group by employeename 
order by (case when employeename like 'vik%' then 1 
       when employeename like '% vik%' then 2 
       else 3 
      end);

來源

2016-08-01 11:34:42

執行'SELECT DISTINCT'返回與'UNION'相同的結果。 – jarlh

@jarlh。。。在表中存在重複名稱是不太可能的 - 因爲單獨的查詢*可能會返回重複項。如果有，那麼'選擇不同'將是適當的。 –

如果我執行'SELECT DISTINCT'，則查詢會引發錯誤 - 如果指定了SELECT DISTINCT，則ORDER BY項必須出現在選擇列表中。 – braceyourself

添加一列表序列

select employeename, 1 as my_order from employeetable where employeename like 'vik%' 
union 
select employeename, 2 from employeetable where employeename like '% vik%' 
union 
select employeename, 3 from EmployeeTable where employeename like '%vik%' and employeename not like 'vik%' and employeename not like '% vik%' 
order by my_order asc, empleemployeename asc;

來源

2016-08-01 11:34:59 scaisEdge

select employeename, a as _order from employeetable where employeename like 'vik%' 
union 
select employeename, b as _order from employeetable where employeename like '% vik%' 
union 
select employeename, c as _order from EmployeeTable where employeename like '%vik%' and employeename not like 'vik%' and employeename not like '% vik%' 
order by my_order asc, empleemployeename asc;

來源

2016-08-01 11:38:14

select 1 s,employeename from employeetable where employeename like 'vik%' 
union 
select 2 s, semployeename from employeetable where employeename like '%vik%' 
union 
select 3 s,employeename from EmployeeTable where employeename like '%vik%' and employeename not like 'vik%' and employeename not like '% vik%'  
order by s;

你的3個表內的進一步排序順序是不確定的，如果不指定

來源

2016-08-01 11:38:56 Cato

使表的聯合顯示，以便它們應用

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