在 SQL Oracle SQL 开发人员中将不同表中的两列合并为一列

Question

所以，我正在尝试运行一个要求我将两个单独的 table 连接在一起的查询，但我需要将一些信息合并到一个列中，并标记它来自哪个 table。

像这样...

    table_1            table_2
    teacher_name       student_name
    Steve              Jimmy
    George             Craig

    Output:

    NAME:       Title:
    Steve       Teacher
    George      Teacher
    Jimmy       Student
    Craig       Student

这是我目前所拥有的...

    SELECT x.first_name, x.last_name, y.first_name, y.last_name, x.city, y.city
    FROM (SELECT i.first_name, i.last_name, z.city, z.zip
    FROM instructor i JOIN
    zipcode z
    ON z.zip = i.zip
    WHERE z.zip = 10025) x

        LEFT OUTER JOIN

            (SELECT s.first_name, s.last_name, z.city, z.zip
            FROM student s JOIN zipcode z
            ON s.zip = z.zip
            WHERE z.zip = 10025) y
            ON y.zip = x.zip

基本上，我需要做的就是将 x 和 y 查询中的名字和姓氏以及来自两者的城市合并到一个列中，然后创建一个列来标识是否这个人来自导师 table (x) 或学生 table (y)

更新：

所以我最终放弃了子查询和外连接，我得到了查询工作......这是我最终得到的代码。非常感谢！

    SELECT i.first_name AS first_name, i.last_name AS last_name, 'Teacher' AS role
    FROM instructor i JOIN zipcode z
    ON i.zip = z.zip
    WHERE z.zip = 10025

    UNION ALL

    SELECT s.first_name AS first_name, s.last_name AS last_name, 'Student' AS role
    FROM  student s JOIN zipcode z
    ON s.zip = z.zip
    WHERE z.zip = 10025
    ORDER BY role, last_name, first_name;

Answer 1

SELECT teacher_name + teacher_last as Name, city, 'Teacher' as source
FROM TeacherTable       
UNION ALL
SELECT student_name + student_last as Name, city, 'Student' as source
FROM StudentTable

在 SQL Oracle SQL 开发人员中将不同表中的两列合并为一列

Combining two columns from separate tables into one in SQL Oracle SQL developer

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