在SQL中使用UNION垂直连接表行

当我使用

UNION

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

名称在输出中混合，有没有办法像这样垂直地将它们分开，但仍然使用UNION，我对此有分配，但仍然卡住了

STUNAME
Alvin
Jane
STFNAME
Lincoln
Kate

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如果我正确理解了您的问题，您应该使用以下内容：

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

字段名称必须相同，状态别名字段将包含它们所属的分类。

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;

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正确地澄清您的问题。对不起，通常使用UNION会将不同表中的列连接到一个列中作为输出，有没有办法将输出行垂直分为两种类型的名称？而不是显示STUNAME:name1，name1…，name\n。有没有办法让它像STUNAME:name1，name2，name3 STFNAME:name4，name5，name6一样垂直使用UNION？

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;