Question

I know it is a very silly question, and it may be found all over the internet, but still if you all dont mind i want someone to point out the problem in my query. I am using a single query to delete from multiple table, i dnt have any foreign keys in the two tables..

Here’s the table structure of the two table

table 1: dt_my_domain

|----------|----------------|
| username | domain_email   |
|----------|----------------|

and

table 2: dt_my_contact

|----------|-------|----------------|------------------|--------|
| user     | email | contact_person | contact_email    |  type  |
|----------|-------|----------------|------------------|--------|

now, the table dt_my_domain have username as primary key,
and domain_email is unique.

similarly in table dt_my_contact email is unique.

I want to delete from the two table, on the basis of domain_email and email so that when the two matches the corressponding tuple gets deleted from the two tables

Here’s the query i’m running,

DELETE FROM dt_my_domain, dt_my_contact
   USING dt_my_domain
INNER JOIN dt_my_contact USING(email) 
WHERE dt_my_domain.domain_email = '[e-mail]'

so, its giving the database error

Unknown column 'email' in 'from clause'

Now How can i solve this by my query, I want to debug or the problem with this query

Answer 1

DELETE d,c FROM dt_my_domain d inner join dt_my_contact c
   on d.domain_email = c.email
WHERE d.domain_email = '[e-mail]'