如何显示本地磁盘上的图像？

Question

I need to display a images from local disk as well as from database

normally i used like

<img src="/images/ome.jpg"> 

if above image is already copied to the application, then only displayed

I like to get a image from db and local drive

Answer 1

What you seem to really be looking for is a cascading delete foreign key constraint. Assuming that Emp_Id is the primary key in EmpProof , you can define:

alter table EmpQuali add constraint fk_empquali_empid
    foreign key (emp_id) references empproof (emp_id)
        on delete cascade;

Then when you delete from EmpProof , corresponding rows will be deleted from EmpQuali :

DELETE FROM EmpProof WHERE EmpProof.Emp_id = 2;

Answer 2

You can try this (I don't know as you call your id field):

CREATE TABLE #app (id_empproof int , id_empquali int)

INSERT INTO #app
SELECT EmpProof.Emp_id, EmpQuali.emp_id
FROM EmpProof
INNER JOIN EmpQuali  
on EmpProof.Emp_id= EmpQuali.Emp_id Where EmpProof.Emp_id = 2

So you can write two deletes operations, as follow:

DELETE FROM EmpProof
WHERE EXISTS (SELECT 'x'
FROM #app a
WHERE a.empproof_id = empproof.emp_id)

DELETE FROM EmpQuali
WHERE EXISTS (SELECT 'x'
FROM #app a
WHERE a.empquali_id = empquali.emp_id)