在SQL中使用UNION垂直连接表行

Question

当我使用UNION

将他们加在一起时，我有2个表格Student and Staff

SELECT STUNAME, STUGENDER,
   FROM STUDENT
   UNION
   SELECT STFNAME, STFGENDER
   FROM STAFF
   ORDER BY 1 ASC;

这个名字在输出中是混合的，有没有办法像这样垂直地分开它们，但仍然使用UNION，我已经对此进行了分配并且仍然卡住了

STUNAME
Alvin
Jane
STFNAME
Lincoln
Kate

Answer 1

如果我理解你的问题，你应该使用这样的东西：

(SELECT STUNAME, STUGENDER, 'student' as student FROM STUDENT)
UNION 
(SELECT STFNAME, STFGENDER, 'staff' as staff FROM STAFF)
order by 3,1 asc

Answer 2

SELECT StuName as cName, StuGender as Gender, 'Student' as Status
   From Student
UNION
SELECT StfName as cName, StfGender as Gender, 'Staff' as Status
   From Staff

字段需要命名相同，Status别名字段将保存它们所属的分类。

Answer 3

尝试此查询..

SELECT CONCAT('Student',@curRow := @curRow + 1) AS student,STUNAME, STUGENDER FROM STUDENT JOIN (SELECT @curRow := 0) r
UNION 
SELECT CONCAT('Staff',@curRow1 := @curRow1 + 1) AS staff,STFNAME, STFGENDER FROM STAFF JOIN (SELECT @curRow1 := 0) r1;