How to remove constraints from my MySQL table?

Question

I want to remove constraints from my table. My query is:

ALTER TABLE `tbl_magazine_issue` 
DROP CONSTRAINT `FK_tbl_magazine_issue_mst_users`

<

Answer 1

Some ORM's or frameworks use a different naming convention for foreign keys than the default FK_[parent table]_[referenced table]_[referencing field], because they can be altered.

Laravel for example uses [parent table]_[referencing field]_foreign as naming convention. You can show the names of the foreign keys by using this query, as shown here:

SELECT CONSTRAINT_NAME FROM INFORMATION_SCHEMA.KEY_COLUMN_USAGE 
WHERE REFERENCED_TABLE_SCHEMA = '' AND REFERENCED_TABLE_NAME = '';
Then remove the foreign key by running the before mentioned DROP FOREIGN KEY query and its proper name. 

                                                        

              
                
                0
              
                   
                
               讨论(0)
              
                                                  
              
              

                          
             
       
          
              
                                       

     查看其它12个回答


            

                    



               
            

    发布评论:
    

         
                        
    
    
提交评论 
  
  

                    
                    

                    

                        

                        
                         加载中...
                        
                    
                

          

            
            

              
              

            
    


                                 
              
            
                          
    

        
         

                验证码
                

                  
                
                

                   看不清?
                
              
                                  

                    
   
                 
             
              
提交回复
            
          
        

          
 
     
 

        
热议问题