SQL_TRACE ; ; set serveroutput on; alter session set sql_trace=true; select count(*) from firefox; alter session set sql_trace=false; --查看sql_trace trace file select * from v$diag_info where name like 'Default%'; select sid,serial# from v$session ; v…
集合函数; declare type list_nested ) not null; v_all list_nested := list_nested('changan','hubei','shanghai','beijing','Android','Java-Android'); BEGIN v_all.); for x in v_all.first .. v_all.last loop dbms_output.put_line(v_all(x)); end loop; --dbms_outp…