I design table which has column "keywords" for keep keywords seperated by comma (,). If user pass one keyword, how can I know that the keyword user select is exactly match with any keyword in field. I mean I just want SQL return only rows that user's keyword is exactly match with at least one keyword in "keywords" column.

Ex.
PK1 Data1 Data2 keywords
1 1 1 apple, orange
2 2 2 mange, orange
3 3 3 mange, apple

If user select keyword 'orange', SQL must return only row 1 and 2.