oracle初学者1000问.chm - oracle初学者1000问.chm oracle初学者1000问.chm oracle初学者1000问.chm

--查询语句:select num_char('ws++rq++sl++dl','++',4) from dual --返回结果:dl(--Query statement:select num_char('ws++rq++sl++dl','++',4) from dual --Return to the result:dl)