Question

My SQL table is something like this:

id, name, value1, value2, value3, value4
1, xyz, 1, 2, 4, 1
2, xyz, 4, 2, 4, 1
3, abc, 4, 2, 4, 1
4, abc, 4, 2, 2, 1
5, abc, 4, 2, 2, 1

I want to write a Sql query which returns rows which has any of their values (read: value1,value2,value3,value4) changed. So the result output would be:

id, name, value1, value2, value3, value4
1, xyz, 1, 2, 4, 1
2, xyz, 4, 2, 4, 1
4, abc, 4, 2, 2, 1

I understand, if I just needed values in output I could have used Distinct or Group by like:

select distinct value1,value2,value3,value4 from table;

But, here I need id and name columns too in output.

Wondering if I really need to write a subquery or create virtual/inner table to get my result. Or, there is a smarter way?

My question is not similar to How to find out whether a table has some unique columns. Let me know if you think otherwise, I can clarify.

Answer 1

Try this

SQL FIDDLE EXAMPLE

select *
from table
where id in (select min(id) from temp group by value1,value2,value3,value4)