Mysql查询创建一个带有join和distinct的视图

Question

i need some helps with a query that i can create correctly for what i want.

i'm explaining all:

accounts ( id, name, surname,email, telephone ..) with id pk boc (ad,username, port..) with ad pk .

Telephone and Username have the same values in their tables

i need to create a view that's report all fields are into table accounts and table bow and that have as ports 16 and 17.

My query is:

CREATE VIEW exportable 
AS
(SELECT A.ID,A.NOME,A.SURNAME,A.EMAIL,A.TELEPHONE,B.AD,B.USERNAME,B.PORT
  FROM ACCOUNTS A, BOC B
 WHERE A.TELEPHONE = B.USERNAME AND B.PORT= 16 AND 17);

this query works in a good way, i have all field and row are completed, but obv this kind of query doesn't exclude some copies row, that i need to exclude. Can someone give me a suggestion ?

Thank you. Regards

Answer 1

first think i notice is that you you should use JOIN instead of this all fashion way of joining table... Your query may look like this than

SELECT A.ID,A.NOME,A.SURNAME,A.EMAIL,A.TELEPHONE,B.AD,B.USERNAME,B.PORT
FROM ACCOUNTS A
INNER JOIN BOC B
ON A.TELEPHONE = B.USERNAME 
WHERE B.PORT = 16 OR B.PORT = 17

I understand that B.PORT should be 16 OR 17 I'm not quiet sure how your table data looks like...

GL!

Answer 2

Just add this to your "where" statement to exclude some rows:

and A.id not in (12, 13, 14)

where 12, 13 and 14 are the exception id's.