Question

I have a table

scores(user, score)

and I have this query

SET @row_num = 0; 
SELECT @row_num := @row_num + 1 as row_index, user, score 
FROM scores ORDER BY score DESC

now I want to select, from this query result, the user with name ‘john’ and score ‘1400’ to know what is his row_index, something like

SELECT row_index 
FROM *result* WHERE user='john' AND score=1400

how do I do that? I tried

SET @row_num = 0; 
SELECT row_index 
FROM (SELECT @row_num := @row_num + 1 as row_index, user, score 
      FROM scores ORDER BY score DESC)      
WHERE user='john' AND score=1400`

but phpMyAdmin says

#1248 - Every derived table must have its own alias

How can I do that?

Thank you,
Alessandro

Answer 1

You haven’t added an alias to the derived table.

SELECT row_index FROM (...) AS alias
WHERE alias.user = 'john' AND alias.score = 1400