On 03/12/2010 16:56, Paul Halliday wrote:
On Fri, Dec 3, 2010 at 12:50 PM, Mark Goodge<m...@good-stuff.co.uk> wrote:
Given a table containing a range of INT values, is there any easy way to
select from it the lowest non-zero number?
SELECT number FROM table WHERE number> 0 ORDER BY number ASC LIMIT 1;
Sorry, I should have said that I need to do this as part of a query
which returns other data as well, including data from the rows which
have a 0 in this column. So I can't exclude them with the WHERE clause.
What I'm actually doing is something like this:
SELECT
name,
AVG(score) as average,
count(score) as taken
FROM tests GROUP BY name
and I want to extend it to something like this:
SELECT
name,
AVG(score) as average,
COUNT(score) as attempts,
SUM(score = 0) as failed,
SUM(score > 0) as passed,
MAX(score) as best_pass,
..... as lowest_pass
FROM tests GROUP BY name
and I need an expression to use in there to get the lowest non-zero
value as lowest_pass.
Does that make sense? And, if so, is there any easy way to do it?
Mark
--
http://mark.goodge.co.uk
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