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.
it will be much easy if you store those numbers in a temporary table so you can do join, eg
SELECT a.*
FROM temporaryTable a
LEFT JOIN tableWithNumbers b
ON a.ID = b.ID
WHERE b.ID IS NULL
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.
You can use IN for that:
SELECT id FROM table WHERE id NOT IN (1, 10, 15, 17, 20)
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