試圖將三個表連接在一起，並獲得語法錯誤

Question

我想寫一個postgres查詢，將三個表連接在一起。我相信我擁有了一切正確的，但是當我運行查詢我得到一個語法錯誤：

select 
cwd_user.id, 
cwd_user.user_name username, 
cwd_user.email_address emailaddress, 
cwd_user.active active 
cwd_user.created_date created 
cwd_membership.child_id 
cwd_membership.parent_name groupname 
licenserolesgroup.id 
licenserolesgroup.license_role_name application 
from 
cwd_user 
inner join cwd_membership on cwd_membership.child_id = cwd_user.id 
inner join licenserolesgroup on cwd_membership.child_id =   licenserolesgroup.id; 

查詢應能夠輸出：

• 用戶ID
• 的userName
• EMAILADDRESS
• 活動
• createdDate
• 孩子ID（用於匹配的組表）
• 組名
• licenseID
• 應用

任何幫助，將不勝感激。我沒有做過很多與連接。我猜試驗了火！

Answer 1

你錯過了一堆尾隨的逗號。嘗試改爲：

select 
cwd_user.id, 
cwd_user.user_name username, 
cwd_user.email_address emailaddress, 
cwd_user.active active, 
cwd_user.created_date created, 
cwd_membership.child_id, 
cwd_membership.parent_name groupname, 
licenserolesgroup.id, 
licenserolesgroup.license_role_name application 
from 
cwd_user 
inner join cwd_membership on cwd_membership.child_id = cwd_user.id 
inner join licenserolesgroup on cwd_membership.child_id = licenserolesgroup.id; 

Answer 2

我沒有在帖子中看到任何錯誤消息。我認爲這是因爲在每場結束時缺少'，'（逗號）字符？

select 
cwd_user.id, 
cwd_user.user_name username, 
cwd_user.email_address emailaddress, 
cwd_user.active active, 
cwd_user.created_date created, 
cwd_membership.child_id, 
cwd_membership.parent_name groupname, 
licenserolesgroup.id, 
licenserolesgroup.license_role_name application 
from 
cwd_user 
inner join cwd_membership on cwd_membership.child_id = cwd_user.id 
inner join licenserolesgroup on cwd_membership.child_id = licenserolesgroup.id;