DROP FOREIGN KEY

Question

我没有在MYSQL中给我的外键命名。但现在我需要放弃它。谁能帮我 ？？下面

Answer 1

用它来找到你的约束的名字：

select 
    table_name, 
    column_name, 
    constraint_name, 
    referenced_table_name, 
    referenced_column_name 
from information_schema.key_column_usage 
where table_name = 'Your_table'; 

，然后使用下面的语句删除它：

alter table your_table drop foreign key <foreign_key_constraint_name>; 

Answer 2

SELECT 
constraint_name 
FROM 
information_schema.REFERENTIAL_CONSTRAINTS 
WHERE 
constraint_schema = 'Blog' AND table_name = 'posts'; 


ALTER TABLE posts DROP Foreign Key keyname;