oracle笔记

分组排序example：

merge into t_directory d

using (select rank() over(partition by parentdircode order by id ) rk,s.* from t_directory s) t

on (t.dircode = d.dircode)

when matched then

update set d.rank = t.rk;



数据库查询某个session会话开启的游标数



select o.sid, osuser, machine, count(*) num_curs

from v$open_cursor o, v$session s

where user_name = 'ADMIN2' and o.sid=s.sid



and machine = 'wsnjc-1970'

group by o.sid, osuser, machine

order by num_curs desc;

oracle数据库记录错误堆栈信息：

Create Or Replace Procedure Proc_testErrLine

Is

i number(8);

Begin

i:=1/0;



exception

when others then

dbms_output.put_line(dbms_utility.format_error_stack());

dbms_output.put_line(dbms_utility.format_call_stack());

dbms_output.put_line(dbms_utility.format_error_backtrace());

End proc_testErrLine;

/

Show Err;

【输出结果】

ORA-01476: divisor is equal to zero

----- PL/SQL Call Stack -----

object line object

handle number name

6978D4BC 10 procedure CQMKT.PROC_TESTERRLINE

6846F2C0 7 anonymous block

ORA-06512: at "CQMKT.PROC_TESTERRLINE", line 5

sql跟踪、计时：

执行

@$ORACLE_HOME/rdbms/admin/utlxplan.sql

@$ORACLE_HOME/sqlplus/admin/plustrce.sql

grant all on plan_table to public;

grant plustrace to public;

set autotrace on;

set timing on;