Using query but it returns a null row? (MySQL) -

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i have table number of values. however, when use command:

select id table id <= 2 , id not null

i following output:

#  id 1  1 2  2 *  null

however, having null row messes things, use in statement on subquery, evaluates false there comparison null value.

could explain why null value exists, , how rid of it?

thanks!


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