Question

I am selecting all badge numbers from a database where category is equal to 1.

category | badge number
0        | 1
1        | 1
2        | 5
1        | 1

Sometimes the category is duplicated, is there a way to only get unique badge numbers from the database?

So above there is two 1’s in category, each with badge number 1. How can I make sure the result only gives ‘1’ rather than ‘1,1’

Answer 1

Use DISTINCT key word in the SELECT statement.

SELECT DISTINCT badge_number FROM Your_Table WHERE category = 1