http://asktom.oracle.com These are the most recently asked questions on Ask Tom en-us Copyright 1999-2006, Oracle Corporation 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. http://asktom.oracle.com/pls/asktom/f?p=100:11:0::::P11_QUESTION_ID:1419803982336 <code>How can I disconnect a particular user ? I try oradim ?shutdown at command line. It shows me no error but doesnot disconnect user. If I have multiple databases running how can I disconnect or kill a particular session of particular database. ... http://asktom.oracle.com/pls/asktom/f?p=100:11:0::::P11_QUESTION_ID:60487964933817 <code>I get PLS-00382: expression is of wrong type in the following scenario: vemail VARCHAR2(80) DEFAULT NULL; for i in 1 .. email_obj.count loop vemail := email_obj(i); end loop; email_obj is an email_array type which is p... http://asktom.oracle.com/pls/asktom/f?p=100:11:0::::P11_QUESTION_ID:2108717300346363018 Mr. Kyte, I am working on databases where the most important concern is insert rate. The databases are on 32-bit RHEL (free buffer waits of course). We are currently inserting at a rate of approx. 4 MB/sec into tables (standard ddl below) that are... http://asktom.oracle.com/pls/asktom/f?p=100:11:0::::P11_QUESTION_ID:13442436575152 <code>Hi Tom, We're product based company and we've mid range ERP systems. The system has financial accouting, sales, production ,hrms, and inventory modules. I've created separate tablespace for each modules and given "autoextend on" for t... http://asktom.oracle.com/pls/asktom/f?p=100:11:0::::P11_QUESTION_ID:48052838748707 <code>Hi Tom,can u plz help me on this what is SCN,why it is used? what is checkpoint?is checkpoint is related to SCN? when database has no transactions going on,when i do checkpoint using alter system checkpoint; why checkpoint number get increa... http://asktom.oracle.com/pls/asktom/f?p=100:11:0::::P11_QUESTION_ID:69076630635645 <code>Dear Tom, Would it be possible to add or remove the columns from a Compressed table. Thanks, -sp </code> http://asktom.oracle.com/pls/asktom/f?p=100:11:0::::P11_QUESTION_ID:2853107469873 <code>Tom, Hope you had a good vacation. Can you please help me understand what does it mean to Perform Top 'N' Analysis. I see this topic under Creating Views in the sql cerfication exam. Thanks a lot. </code> http://asktom.oracle.com/pls/asktom/f?p=100:11:0::::P11_QUESTION_ID:2108252500346390973 Hello Tom, I would need to prepare data for Oracle Datamining. I have in a table about 60 000 data and I would need to randomly split data to the three groups A,B,C. ideally: Group A -> contains 50% of all data Group B -> contains 25% of all d... http://asktom.oracle.com/pls/asktom/f?p=100:11:0::::P11_QUESTION_ID:652524500346295673 Hi Tom, I want to provide a user-friendly program like a progress bar/monitor that indicates to the user that the task is occurring, how long the task might take, and how much work has already been done. Can we do this using a pl/sql procedure.... http://asktom.oracle.com/pls/asktom/f?p=100:11:0::::P11_QUESTION_ID:4423923392083 <code>Hi Tom, This morning I saw an example on otn describing the sql with clause in 9i. I also saw an example, unfortunately that page seems to have been removed so cannot give you a reference. Here is the question though. How does a select st...