Question

Below is what I have

++++++++++++++++++++++++
+ id + field1 + field2 +
++++++++++++++++++++++++
+ 1  +  1     +        +
+ 1  +  23    +        +
+ 1  +        +   1    +
+ 1  +        +   33   +
+ 2  +  55    +        +
+ 2  +        +   2    +
+ 2  +        +   23   +
++++++++++++++++++++++++

What I want is

++++++++++++++++++++++++
+ id + field1 + field2 +
++++++++++++++++++++++++
+ 1  +  23    +   33   +
+ 2  +  55    +   23   +
++++++++++++++++++++++++

I want to combine the rows (with greatest data) and show data for user in one row against multiple rows like I have in table.

Any idea how to do it?

Note : I don’t have any row who have data for all fields. Only 1 data in one row and two or more rows per user.

I tried with

SELECT id, GROUP_CONCAT(MAX(field1)), GROUP_CONCAT(MAX(field2)) from myTable
GROUP BY id;

but its giving error as

Invalid use of group function:

data at sqlfiddle

This question is bit advanced to my earlier question, showing data in one row (from multiple rows)

Answer 1

SELECT id, MAX(field1), MAX(field2) FROM myTable GROUP BY id;