mysql关键字搜索同一个表的多个字段

$tj_sql=" and (brand_name like '%$keyword%' or number like '%$keyword%' or groups  like '%$keyword%'  or repair_id in(SELECT AdminId FROM tb_admin where IsSuper = 3 and RealName like '%$keyword%'))";
$sql="SELECT * FROM tb_zcbx where 1=1 $tj_sql ORDER BY id DESC  LIMIT $page,$rows";

where (字段名 like %关键字% or 字段名 like %关键字%)