mysql - Select ID that doesn't have field with certain content -


i have following table:

userid | key      | value 1        color      green 1        eyes       blue 1        hair       brunette 2        color      red

how can select userids don't have key 'eyes'?

using single query can count key = eyes , compare count 0 have userids don't have key named eyes

select `userid`, sum(`key` = 'eyes') `count` t group `userid` having `count` = 0

demo


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