留在刪除查詢

Question

我有一個問題與MySQL查詢加盟.. 查詢是：

DELETE address_book.*, address_book_tags.*, address_book_tags_contacts.* from address_book, address_book_tags, address_book_tags_contacts 
      LEFT JOIN address_book_tags_contacts on address_book.id = address_book_tags_contacts.contactId 
      LEFT JOIN address_book_tags on address_book_tags_contacts.tagId = address_book_tags.id 
    WHERE address_book.idVitalStatistic=1; 

的錯誤是：

RuntimeException的「與消息」不是唯一的表/別名：'address_book_tags_contacts'（1066）'

我該怎麼辦？

Answer 1

您在FROM中有一個表address_book_tags_contacts和address_book_tags，就像在一個LEFT JOIN中一樣。如果這是故意的（我不這麼認爲），你必須給他們一個獨特的名字。但我想你應該從FROM子句中刪除這些表名。

Answer 2

address_book_tags_contacts需要別名，像這樣;）

DELETE address_book.*, abt1.*, abtc1.* 
FROM 
    address_book, address_book_tags abt1, address_book_tags_contacts abtc1 
    LEFT JOIN address_book_tags_contacts abtc2 ON ... 
    LEFT JOIN address_book_tags abt2 ON ... 

@Steve要通過此查詢居然要刪除什麼。

Answer 3

address_book_tags, address_book_tags_contacts出現兩次。

刪除重複的：

DELETE address_book.*, address_book_tags.*, address_book_tags_contacts.* 
from address_book 
    LEFT JOIN address_book_tags_contacts on address_book.id = address_book_tags_contacts.contactId 
    LEFT JOIN address_book_tags on address_book_tags_contacts.tagId = address_book_tags.id 
WHERE address_book.idVitalStatistic=1; 

Answer 4

嘗試：

DELETE address_book, address_book_tags, address_book_tags_contacts from address_book 
      LEFT JOIN address_book_tags_contacts on address_book.id = address_book_tags_contacts.contactId 
      LEFT JOIN address_book_tags on address_book_tags_contacts.tagId = address_book_tags.id 
    WHERE address_book.idVitalStatistic=1;