mysql - using LIKE %% with LEFT JOIN -

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ok, used "like" "left join" , works fine.

$sql = $conn->query("select * tasks t                       left join users u                       on t.allowed_countries u.country                       u.username = '$username'");

but when i'm try use "like %%" instead of using "like" gives me error

like '%" u.country "%'

can tell me problem please?

thank you.

use concat % char literal.

like concat('%',u.country,'%')

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