删除SQL表中的重复值

我需要帮助，我有一个请求：

 select 
       df.ID, 
       df.login as name,
       ev.NAME as organizations,
       cv.role_names as role
  from ORGANIZATIONS_USERS lo
       LEFT JOIN users_cdf ON df.ID = lo.USER_ID
       LEFT JOIN ORGANIZATIONS ev ON lo.ORGANIZATION_ID = ev.id
       LEFT JOIN APEX_APPL_ACL_USERS cv ON df.login = cv.USER_NAME

我的答案是:

ID   NAME   ORGANIZATIONS   ROLE  
1    John   Home            1
2    Sam    Work3           2
2    Sam    Work2           2
2    Sam    Work1           2
5    Tom    TOV             3

我不想重复相同名称的条目

ID   NAME   ORGANIZATIONS   ROLE  
1    John   Home            1
2    Sam    Work3           2
5    Tom    TOV             3

您可以通过以下方式使用分组：

select df.ID, 
df.login as name,
ev.NAME as organizations,
cv.role_names as role
from ORGANIZATIONS_USERS  lo
   LEFT JOIN users_c      df         
ON df.ID = lo.USER_ID
  LEFT JOIN ORGANIZATIONS      ev  
ON lo.ORGANIZATION_ID = ev.id
 LEFT JOIN APEX_APPL_ACL_USERS cv
ON df.login = cv.USER_NAME
GROUP BY df.login, df.id

您可以在此处查看示例：

请注意，在回答中，您必须插入您想要分组的内容。我假设dg.login

您可以通过以下方式使用组：

select df.ID, 
df.login as name,
ev.NAME as organizations,
cv.role_names as role
from ORGANIZATIONS_USERS  lo
   LEFT JOIN users_c      df         
ON df.ID = lo.USER_ID
  LEFT JOIN ORGANIZATIONS      ev  
ON lo.ORGANIZATION_ID = ev.id
 LEFT JOIN APEX_APPL_ACL_USERS cv
ON df.login = cv.USER_NAME
GROUP BY df.login, df.id

您可以在此处查看示例：

---

请注意，在回答中，您必须插入您想要分组的内容。我假设dg.login

将导致问题的原因汇总到组织中，按其余部分分组：

  SELECT df.ID,
         df.login AS name,
         MAX (ev.NAME) AS organizations,                              --> this
         CV.role_names AS role
    FROM ORGANIZATIONS_USERS lo
         LEFT JOIN users_c df ON df.ID = lo.USER_ID
         LEFT JOIN ORGANIZATIONS ev ON lo.ORGANIZATION_ID = ev.id
         LEFT JOIN APEX_APPL_ACL_USERS CV ON df.login = CV.USER_NAME
GROUP BY df.id, df.login, CV.role_names                               --> this

---

汇总导致问题的原因组织，按其余部分分组：

  SELECT df.ID,
         df.login AS name,
         MAX (ev.NAME) AS organizations,                              --> this
         CV.role_names AS role
    FROM ORGANIZATIONS_USERS lo
         LEFT JOIN users_c df ON df.ID = lo.USER_ID
         LEFT JOIN ORGANIZATIONS ev ON lo.ORGANIZATION_ID = ev.id
         LEFT JOIN APEX_APPL_ACL_USERS CV ON df.login = CV.USER_NAME
GROUP BY df.id, df.login, CV.role_names                               --> this

---

提示：分组依据。您需要删除重复的值吗？你写道：我不想重复那些同名的条目，你的意思是删除而不重复吗？或者只是这个问题的标题有误？提示：分组依据。您需要删除重复的值吗？你写道：我不想重复那些同名的条目，你的意思是删除而不重复吗？或者只是这个问题的标题错了？