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:2290062993260 <code>Hi, How to determine if an index needs to be rebuilt if the optimizer mode is RULE? Thanx. </code> http://asktom.oracle.com/pls/asktom/f?p=100:11:0::NO::P11_QUESTION_ID:8764517459743 <code>I am new in tuning sql statements. Can u give a methodology of tuning the sql statements. </code> 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: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:3083286970877 <code>Tom: I have a table that initially stores information about items in a warehouse stored in different bins. Table look like this where manual inventories are done every 3 months. Effective date is the sysdate when record is inserted. Inv... 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:1925449800346276345 Hi Tom, Oracle has just shipped 11g release 2 for Linux on OTN. What are your favorites features of release 2 with respect to release 1 ? Thanks. http://asktom.oracle.com/pls/asktom/f?p=100:11:0::NO::P11_QUESTION_ID:6263249199595 <code>Here's a real short one for you Tom: Why doesn't Oracle RDBMS have a boolean datatype? </code> http://asktom.oracle.com/pls/asktom/f?p=100:11:0::NO::P11_QUESTION_ID:728425384831 <code>Hi, I've a table : " TABLE2000 " with Partitions : TAB_1999_H1( Tablespace TAB_DATA_99) TAB_1999_H2( Tablespace TAB_DATA_99) TAB_2000_H1( Tablespace TAB_DATA_00) ... 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...