Question

I have a table data with columns names number, start, end

I now need to select the numbers(fields of column number) which have appeared twice or more and then count them for how may times they have appeared.

Any simple way to do this?

Example: -number——-start——-end—-

      191            x          x
      123            x          x
      45             x          x
      191            x          x
      37             x          x
      191            x          x
      45             x          x

So now the result should be : 2 (191 and 45 – both repeated twice or more)

Answer 1

SELECT `number`, COUNT(`number`) AS count
FROM `data`
GROUP BY `number`
HAVING COUNT(`number`) > 1
ORDER BY COUNT(`number`) DESC;

For the given set of input values, the output shall be:

------------------
| number | count |
------------------
|   191  |   3   |
------------------
|   45   |   2   |
------------------