Question

I have a table called inventory that includes two columns as follows:

I would like to query this table to return a result set that lists how many items of each condition I have (column headers show in example below are not wanted in result set…just show here to give clarity):

I guess it would look something like:

  SELECT item, sum(condition???), sum(condition???), sum(condition???) 
    FROM inventory 
GROUP BY item

How can I accomplish this? Thanks.

Answer 1

You were very close:

SELECT item, 
  sum(case when `condition` = 'poor' then 1 else 0 end) as poor, 
  sum(case when `condition` = 'fair' then 1 else 0 end) as fair, 
  sum(case when `condition` = 'good' then 1 else 0 end) as good
FROM inventory 
GROUP BY item

See SQL Fiddle with Demo