MYSQL: condition _IN_ doesn't work correct

So I have column 'CLM' in the table where one record has follow value: '4,6,1'.

I do follow select: SELECT * FROM table WHERE 6 IN (CLM) got nothing then.

I do follow select: SELECT * FROM table WHERE 4 IN (CLM) got record described behind.

Cannot understand why first query works wro开发者_如何学运维ng?

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You have to use find_in_set function even though it would be better you normalize your table as already suggested.