http://asktom.oracle.com These are the questions on Ask Tom that have the most "hits" 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::NO::P11_QUESTION_ID:2985886242221 <code>1. Are there any performance concerns with using one Oracle sequence to generate primary key values across a couple thousand tables? We started to go down the path of creating a separate Oracle sequence for each table. Considering the fact that... http://asktom.oracle.com/pls/asktom/f?p=100:11:0::NO::P11_QUESTION_ID:45033135081903 <code>Hi I am trying to use SQLPlus to connect to database directly using just the connect string (ie without referencing to tnsnames.ora) I have this in my tnsnames.ora POD = (DESCRIPTION = (ADDRESS_LIST = (ADDRESS = (PROTOCOL = ... http://asktom.oracle.com/pls/asktom/f?p=100:11:0::NO::P11_QUESTION_ID:2196162600402 <code>Hi Tom, Is there anyway that I can just use SQL to do string concatenation on a VARCHAR2 field much the same way that a SUM() function is used on a NUMBER field. For example, SELECT SUM(revenue), department FROM sales_table ... http://asktom.oracle.com/pls/asktom/f?p=100:11:0::NO::P11_QUESTION_ID:3027089372477 <code>Hi Tom, Luckily I'm in the position to ask a question right now ... I've been searching the archives, but didn't find a solution ... My problem is the following: I've a query like ... SELECT U.UserId, U.LoginName, U.PassWord, U.For... http://asktom.oracle.com/pls/asktom/f?p=100:11:0::NO::P11_QUESTION_ID:431775600346873836 i'm running oracle on standalone computer at home.it used to work properly but from couple of days i'm getting error stating "<b>ORA-12560: TNS:protocol adapter error</b> " what should i do? please help.. ... http://asktom.oracle.com/pls/asktom/f?p=100:11:0::NO::P11_QUESTION_ID:15695764787749 <code>Hi Tom, I was at your conference in MTL in february. It was a pleasure to finally meet you. My question is regarding the refresh of MVs. We are using Discoverer with a 9i Database in Archivelog mode. The problem is when we need to re... http://asktom.oracle.com/pls/asktom/f?p=100:11:0::NO::P11_QUESTION_ID:1739411218448 <code>Hi Tom I hope I'm phrasing this correctly... I'd like to be able to send an HTML formatted email from the database using the UTL_SMTP package. I don't see any way of setting the MIME type. Is this beyond the scope of UTL_SMTP? than... http://asktom.oracle.com/pls/asktom/f?p=100:11:0::NO::P11_QUESTION_ID:367980988799 <code>Can you give me a solution for converting CLOBS datatype to VARCHAR datatypes, all the documents I refer to talk about converting BLOBS to VARCHAR and when I try and apply the examples to CLOBS, get errors </code> http://asktom.oracle.com/pls/asktom/f?p=100:11:0::NO::P11_QUESTION_ID:127412348064 <code>I would like to fetch data after joining 3 tables and sorting based on some field. As this query results into approx 100 records, I would like to cut the result set into 4, each of 25 record. and I would like to give sequence number to ea... http://asktom.oracle.com/pls/asktom/f?p=100:11:0::NO::P11_QUESTION_ID:880343948514 <code>Tom: create table test( a int); begin for i in 1..10000 loop insert into test values (i); end loop; end; set autotrace on select count(0) from test; Execution Plan ---------------------------------------------------------- 0...