SQL-如何在UNION查询中排序

Question

有没有一种方法可以合并两个表，但是将第一个表中的行保留在结果集中的最前面？但是，orderby列不在选择查询中

例如：

表格1

name        surname
-------------------
John         Doe
Bob          Marley
Ras          Tafari

表2

name       surname
------------------
Lucky      Dube
Abby       Arnold
Result

预期结果：

name        surname
-------------------
John         Doe
Bob          Marley 
Ras          Tafari
Lucky      Dube
Abby       Arnold

我通过以下查询带来数据

SELECT name,surname FROM TABLE 1 ORDER BY ID  
UNION  
SELECT name,surname FROM TABLE 2

上面的查询并没有跟踪联合之后的顺序。
PS-我不想在我的选择查询中显示ID，我
通过连接表获得ORDER BY Column。以下是我的真实查询

  SELECT tbl_Event_Type_Sort_Orders.Appraisal_Event_Type_ID AS Appraisal_Event_Type_ID , ISNULL(tbl_Appraisal_Event_Types.Appraisal_Event_Type_Display_Name, 'UnCategorized') AS  Appraisal_Event_Type_Display_Name 
INTO #temptbl
FROM tbl_Event_Type_Sort_Orders 
INNER JOIN tbl_Appraisal_Event_Types
ON tbl_Event_Type_Sort_Orders.Appraisal_Event_Type_ID = tbl_Appraisal_Event_Types.Appraisal_Event_Type_ID
WHERE 1=1
AND User_Name='abc' 
ORDER BY tbl_Event_Type_Sort_Orders.Sort_Order

SELECT * FROM #temptbl 
UNION 
SELECT DISTINCT (tbl_Appraisal_Event_Types.Appraisal_Event_Type_ID) AS Appraisal_Event_Type_ID , ISNULL(tbl_Appraisal_Event_Types.Appraisal_Event_Type_Display_Name, 'UnCategorized') AS  Appraisal_Event_Type_Display_Name 
FROM tbl_Appraisal_Event_Types
INNER JOIN tbl_Appraisal_Events
ON tbl_Appraisal_Event_Types.Appraisal_Event_Type_ID = tbl_Appraisal_Events.Event_Type_ID
INNER JOIN tbl_Appraisals 
ON tbl_Appraisal_Events.Appraisal_ID = tbl_Appraisal_Events.Appraisal_ID
WHERE 1=1
AND ((tbl_Appraisals.Assigned_To_Staff_User) = 'abc'  OR (tbl_Appraisals.Assigned_To_Staff_User2) = 'abc' OR (tbl_Appraisals.Assigned_To_Staff_User3) = 'abc')

Answer 1

将放入UNION ALL派生表中。为了避免重复出现，请在第二个选择中select distinct添加，并添加一个NOT EXISTS，以避免在两个表中都找到相同人时返回两次：

select name, surname
from
(
    select distinct name, surname, 1 as tno
    from table1
    union all
    select distinct name, surname, 2 as tno
    from table2 t2
    where not exists (select * from table1 t1
                      where t2.name = t1.name
                        and t2.surname = t1.surname)
) dt
order by tno, surname, name