sql - How can i get rows from database -


in database there fields values this:

14,20,12,13,1,22,28,23,5,3,30,15

i want take have value 20.

i tried this:

select * user 20 in (expertise)

so returns lines begin 20

select * user expertise=20

or 

select * user expertise in (20)

or if have comma seperated values

 select * user expertise "%20%"

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