Question

I have a table for articles with several fields ,each article can have photo/photos ,is it good that have a field for photo in article_table or i make another table for photo/photos and why?

thanks

Answer 1

Since you mention “photos” plural, I’ll assume you can have multiple photos per article.

In that case, you’d want an association table.

Something like:

ARTICLE
--------------
ID(pk)    NUMBER NOT NULL,
AUTHOR_ID NUMBER NOT NULL,
TITLE     VARCHAR NOT NULL,
CONTENT   CLOB NOT NULL

ARTICLE_PHOTO
-----------------
ARTICLE_ID NUMBER NOT NULL,
PHOTO_ID NUMBER NOT NULL

(ARTICLE_ID, PHOTO_ID) is the PK, and both ARTICLE_ID and PHOTO_ID are FKs

PHOTO
--------------------
ID(pk) NUMBER NOT NULL,
PHOTO  BLOB NOT NULL