转换此选择/加入查询以删除匹配的记录

Question

如何转换以下查询以删除与ProjectID / Project_ID匹配的记录为14？

select * from Project join Project_Assigned 
where Project.Project_ID = Project_Assigned.ProjectID 
and Project.Project_ID = 14;

select语句有效但当我尝试将其转换为删除匹配的记录时，我得到ERROR 1064（42000）。

delete * from Project join Project_Assigned 
where Project.Project_ID = Project_Assigned.ProjectID 
and Project.Project_ID = 14;

Answer 1

试试这个

DELETE FROM Project
WHERE Project_ID = 14
  AND Project_ID IN
    (SELECT ProjectID FROM Project_Assigned
     WHERE ProjectID = 14)

Answer 2

您收到第一个错误，因为delete不能包含join子句。

我认为你不能只在一个查询中做到这一点。您需要使用Project_Assigned和Project考虑所有相关表，并查看其外键并首先删除其记录。 此外，由于外键，您必须在从Projects中删除记录之前从Project_Assigned中删除记录。