组合来自不同表的列值

Question

我卡住了。我有 2 张桌子 - 看图 1 Table columns And i would like to build query, that will give me the result - it is showed on image no 2. the result of query。

我有 2 个查询，我想将它们混合起来，以从图像 2 中获取列表。请帮助我，如何构建查询。

查询 1：SELECT department_name，department_id 来自 department_id 在 90 和 110 之间的部门；
查询 2：SELECT last_name，department_id 来自雇员 WHERE department_id 90 AND 110 之间；

Answer 1

SELECT c.last_name,
       d.department_id,
       d.department_name
FROM employee c
JOIN deptartment d ON d.department_id=c.department_id
WHERE d.department_id BETWEEN 90 AN 110

我的示例输出 table

+-------+----+------------+
| KING  | 10 | ACCOUNTING |
| BLAKE | 30 | SALES      |
| CLARK | 10 | ACCOUNTING |
| JONES | 20 | RESEARCH   |
| SCOTT | 20 | RESEARCH   |
+-------+----+------------+

Answer 2

查询:

with departments (department_id, department_name) as (
        select  90, 'Executive'  from dual union all
        select 100, 'Finance'    from dual union all
        select 110, 'Accounting' from dual
     ),
     employees (employee_id, last_name, department_id) as (
        select 1003, 'King'     ,  90 from dual union all
        select 1005, 'De Hann'  ,  90 from dual union all
        select 1009, 'Gietz'    , 110 from dual union all
        select 1013, 'Popp'     , 100 from dual union all
        select 1014, 'Chen'     , 100 from dual union all
        select 1015, 'Higgins'  , 110 from dual union all
        select 1029, 'Greenberg', 100 from dual union all
        select 1040, 'Kochar'   ,  90 from dual union all
        select 1043, 'Faviet'   , 100 from dual union all
        select 1045, 'Urman'    , 100 from dual union all
        select 1049, 'Sciarra'  , 100 from dual
     )
     --   end input data;   begin actual query   --
select c_name, department_id from 
  ( select department_name as c_name, department_id, 0 as categ from departments
    union all
    select '    ' || last_name as c_name, department_id, 1 from employees
    order by department_id, categ, c_name
  );

结果：

C_NAME        DEPARTMENT_ID
------------- -------------
Executive                90
    De Hann              90
    King                 90
    Kochar               90
Finance                 100
    Chen                100
    Faviet              100
    Greenberg           100
    Popp                100
    Sciarra             100
    Urman               100
Accounting              110
    Gietz               110
    Higgins             110

您不需要 "with ..." 部分；只需在两个因式子查询之后（"input data" 之后）使用从 SELECT 语句开始的查询。我什至在每个部门内为您按姓氏排序；如果不需要，只需从 ORDER BY 子句中删除 "c_name"。

我调用了第一列c_name；您可以随意称呼它，但是当它还包含员工姓氏时称它为 department_name 对我来说意义不大。要随意调用它，请将 SELECT 语句从 SELECT c_name, department_id 更改为 SELECT c_name AS whatever, department_id...

组合来自不同表的列值

Combining column values from different tables

oracle

union-all