Question

I have several values, generated from PHP. Like 1, 10, 15, 17, 20.
Also I have a table with several values, like:

id
1
3
10
12
15

I want to write a query, which will give me all numbers, which do not exist in table id column.
In my example, values of 17 and 20 should be returned.

Answer 1

I would

SELECT id FROM table WHERE id IN (1, 10, 15, 17, 20)

Which will get you those which are in your set.

And then use some PHP array function to get the substract of the arrays.