MySQL PHP select only non-duplicate entries in a field
I have this SQL tableName:
dataId | projectId | keywords -------|-----------|-------- 1 | 1 | keyword 1, keyword 2, keyword 3, keyword 4, keyword 1 2 | 2 | keyword 5, keyword 6, keyword 7 Is it possible to SELECT dataId, projectId, keywords FROM tableName and echo non-duplicates in dataId 1, project 1 field?
The ideal output would be:
keyword 1, keyword 2, keyword 3, keyword 4
Not
keyword 1, keyword 2, keyword 3, keyword 4, keyword 1
To de-duplicate a comma-separated list of string, you can do this:
$keywords = 'keyword 1, keyword 2, keyword 3, keyword 4, keyword 1'; $dedup = implode(', ', array_unique(array_map('trim', explode(',', $keywords)))); echo $dedup; Result:
keyword 1, keyword 2, keyword 3, keyword 4 You should probably do this before inserting to your database for performance. But it’ll also work afterwards.
