Question

I’m trying this sqlite query on an existing database and table:

INSERT INTO Actions (guide_id, user_id, action_type, action_date, article_id,  guide_name) VALUES (33, 1199180, 2, 1355829894, 2457, 'Amsterdam');

This works, but if I run the same thing again it will insert duplicate values which is not wanted.

This is how the table looks like:

The problem here is that article_id is not unique.
I want the insert only to run when article_id does not exists in the column.

In theory I want something like:

IF x DOES NOT EXISTS IN article_id DO (INSERT INTO Actions (guide_id, user_id, action_type, action_date, article_id,  guide_name) VALUES (33, 1199180, 2, 1355829894, 2457, 'Amsterdam'));

Is this possible?

Answer 1

try:

INSERT INTO Actions (guide_id, user_id, action_type, action_date, article_id,  guide_name)
VALUES (33, 1199180, 2, 1355829894, 2457, 'Amsterdam') WHERE NOT article_id = x;

Another way would be to define the article_id as a UNIQUE key:

create unique index unique_name on Actions (article_id );

You can find more information at the sqlite manual.