SQL IF两个ID相等然后选择

Question

我正在努力获得正确的结果，但我找不到正确的方法。

我有这张桌子：

我想得到像这样的结果

这是我的代码：

SELECT employee_ID, first_name, manager_id ,
       (SELECT first_name from employees where MANAGER_ID= employee_id)
from employees

我只有前3列，第4列是空的，因为错误的选择

Answer 1

自我加入同一张桌子

<div class="history">
  <div class="box1">
    <p>
      The story starts in 2010 with Hartstown
    </p>
  </div>
  <div class="box2">
    <img src="images/clubs.jpg" alt="Clubs">
  </div>
  <div class="box3">
    <img src="images/clubs1.jpg" alt="Clubs">
  </div>
  <div class="box4">
    <h3>Clubs Officialy Merge... </h3>
    <p>May 2011 saw the Official launch of Hartstown Aldridge Legends X1 in Dalymount Park...
    </p>
  </div>
  <div class="box5">
    <h3>Our First Full Season... </h3>
    <p>We started the 2011 / 2012 Season with Approx 280 registered club altogether we had 18 Teams…..
    </p>
  </div>
  <div class="box6">
    <img src="images/logo.jpg" alt="Logo">
  </div>
  <div class="box7">
    <h3>Forging Ahead... </h3>
    <p>We presently have approx 400 Registered Club Players and approx 60 nd 2 Over 35'5 Teams and we are still growing...
    </p>
  </div>
</div>

Answer 2

对不起我的错误解释，我有5列，第一个不在图片中，因为它唯一的行ID，我的第一行是员工ID，第二行是first_name，第三行是经理ID，第四行应该是第一行经理的名字。经理名称是当经理ID等于员工ID时，例如员工ID = 206，名字是William，经理ID是205.名字应该是Shelley，因为Shelley的员工ID是205