Ask Tom MOST RECENT ARTICLES http://asktom.oracle.com These are the most recently asked questions on Ask Tom en-us Copyright 1999-2006, Oracle Corporation AskTom http://asktom.oracle.com/i/asktom2.gif http://asktom.oracle.com 50 50 Ask Tom is a forum where Tom Kyte, Oracle's Database Guru, answers questions regarding Oracle technology, specifically the database. Need to select fields having only numeric data http://asktom.oracle.com/pls/asktom/f?p=100:11:0::::P11_QUESTION_ID:1794145000346577404 Hi, I have a requirement to select only those fields which have numeric value and do not contain any characters SQL> desc priti Name Null? Type ----------------------------------------- -------- -----... generic trigger for auditing column level changes http://asktom.oracle.com/pls/asktom/f?p=100:11:0::::P11_QUESTION_ID:59412348055 <code>I'm trying to create a generic before update trigger which will compare all :old.column_values to all :new.column_values. If the column_values are different, then I would like to log the change to a separate table. When I try to compi... Char Vs Varchar http://asktom.oracle.com/pls/asktom/f?p=100:11:0::::P11_QUESTION_ID:1542606219593 <code>Hi, I am a little confused here, as far as I understood, the VARCHAR2 datatype was supposed use memory equaling to the data in it. But the followig lines from "PL/SQL User?s Guide and Reference" Version 8.1.5 for NT tells a different story.... dbms_metadata.get_ddl - is there a way to get 'dependent triggers' for tables? http://asktom.oracle.com/pls/asktom/f?p=100:11:0::::P11_QUESTION_ID:1794096300346327738 Hi Tom, I need to write code to retrieve the DDL of our Production database. (Don't yell at me, I didn't design this application, I inherited it :-) I need to implement a version control mechanism now, and I need the DDL to create a baseline (v... Is PGA memory allocated from SGA ? http://asktom.oracle.com/pls/asktom/f?p=100:11:0::::P11_QUESTION_ID:1792708400346657442 Hi Tom, Is PGA memory allocated from SGA? In my database SGA_MAX_SIZE is 1504M SQL> sho parameter sga_max_size NAME TYPE VALUE ------------------------------------ ----------- ----------------------... sys password change and orapwd file http://asktom.oracle.com/pls/asktom/f?p=100:11:0::::P11_QUESTION_ID:1792735500346727875 Hi Tom, What is the relation between SYS user password and orapwd file ? What are the various methods to change the SYS user password. If I change the SYS user password using from sqlplus use password command or use alter user ... Insert reading UNDO or looking for HWM? http://asktom.oracle.com/pls/asktom/f?p=100:11:0::::P11_QUESTION_ID:1792961600346684954 Please see sequence of events below. SESSION 1: <code>SQL> create table t (n number); Table created. SQL> insert into t (select rownum from dual connect by level <= 1000000); 1000000 rows created. SQL> commit; Commit complete. ... Parallel Insert and Serialization http://asktom.oracle.com/pls/asktom/f?p=100:11:0::::P11_QUESTION_ID:1793364300346213200 Hi Tom, I learned a lot from your site. Now I have a question. We are trying to run multiple processes to insert into a same table with INSERT INTO... SELECT ..., with setting all selected two FROM tables and inserted into table as parallel, b... Controlling cold backup jobs . When to run and when Not to? http://asktom.oracle.com/pls/asktom/f?p=100:11:0::::P11_QUESTION_ID:1793655900346290291 Hi Tom, Good Morning. We have different ways of scheduling cold backups,like 1) We use RMAN and schedule jobs thru schedulers 2) Use SQL Back track and have maestro to schedule the jobs. 3) DBAs can also run cold backup job on need basis Re... Running Total http://asktom.oracle.com/pls/asktom/f?p=100:11:0::::P11_QUESTION_ID:1793764100346222947 Hello Sir, Could you give a simple example of running total on emp table FOr example, running total of sum (sal + comm) department wise? thanks