Question

I have one data table:

--------------------
ID |  user | Value
--------------------
1  |  1    | 1
--------------------
2  |  1    | 2
--------------------
3  |  2    | 3
--------------------
4  |  2    | 2
--------------------
5  |  3    | 4
--------------------
6  |  3    | 2
--------------------

I would like to SELECT all rows where value is different comparing to user 1 so the result would be rows with IDs 3 (value is 3) and 5 (value is 2)

I would do something like this (will call it A)

SELECT * FROM table WHERE user = 1

and get all the rows from user 1. Than I would select (will call it B)

SELECT * FROM table WHERE user != 1

and get all other rows. And than I would compare them WHERE A.value != B.value.

I’m stuck on how to merge everything together…

Please help!

Answer 1

Try this:

SELECT * 
FROM table
WHERE value NOT IN ( SELECT value FROM table WHERE user = 1)