contains (xx, '' )
contains (table1.xxx, table2.field)
SQL> with t as (select username a_ctx from user_users) 2 select a.*,t.* from a_tab a, t 3 where contains(tname, t.a_ctx )>0; TNAME TABTYPE CLUSTERID A_CTX ------------------------------ ------- ---------- ------------------------------ .. 12 строк выбрано.