Class oracle/sql/converter/CharacterConverters violates loader constraints.

This exception will be thrown when there are multiple JDBC drivers in the classpath and there exists some conflict among these drivers.So better remove the duplicate JDBC drivers and give a try.
This resolved our issues

Learning Java : Static Variables and Static Methods

package Learn;
import java.lang.*;

public class implementingClass {
    static int count;      
           public implementingClass()
           {
               count = count+2;
           }

 static void  increment () {
    count = count+3;
  
}
    public static void main(String[] args) {
        System.out.println("Default value of count: " + count);
        implementingClass.increment();
        System.out.println("count: " + count);
    }
}

Output
Default value of count: 0
count: 3

Static variables are not tied to any object.They will be created at the time of class loading.Static methods can be called without object instantiation.

Redirecting the output of System.out.println, System.err.println to a file/log file.

Sometimes you might need to redirect the output System.out.println,System.err.println to a log file.Refer the following code snippet for doing this

public static void main(String[] args) throws Exception {
ABC abc = new ABC();
PrintStream printStream;
printStream = new PrintStream(new FileOutputStream("C://javaout.log"));
System.setOut(printStream);
System.setErr(printStream);
System.out.println("I am from Out...");
System.err.println("I am from Error");
}

Now check the javaout.log in c drive

Redirecting exception' printStackTrace to a file

catch(Exception e){

: : :

e.printStackTrace( new PrintStream(("C://javaout.log")));

: : :

The server principal "domain\windowsuser" is not able to access the database "DATABSE" under the current security context.

The server principal "domain\windows user" is not able to access the database "DATABSE" under the current security context.
This will normally happen when ODBC Datsource in the ODBCAD32 is configured to use "With Integrated Windows Authentication" mode of authentication to the sql server.
The reason being that the domain\windows user is not added in the list of logins under the security tab of the sql server.
So the solution is to change the authentication type to "With SQL Server authentication using a login ID and password entered by the user".
Sometimes you cannot change the authentication from former to latter,especially when you login as a non-admin user.In this case you need to login with admin user and change the authentication type.

search the existence of an object in sql server 2005.

Quick way to search the existence of an object in sql server 2005.
Create a stored procedure by name 'sp_ObjectSearch' and copy the below code.Now start searching...
ex:-
sp_ObjectSearch 'Employee'
sp_ObjectSearch 'F4211' etc


USE [master]
GO
/****** Object:  StoredProcedure [dbo].[sp_ObjectSearch]    Script Date: 06/23/2009 05:10:38 ******/
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
-- ==========================================================================================
-- >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
-- ==========================================================================================
-- Script Title : sp_ObjectSearch
-- =====================================================================================
-- Description  : Have you ever tried to look for an object in a 
-- SQL Server instance that has hundreds of databases 
-- without knowing the object's exact name and the 
-- database in which it resides? 
-- this proc will look for anyobject with the exisiting instance
-- that match all or part of the search string 
-- =====================================================================================
-- Coder   : Shaunt Khaldtiance
-- Creation Date : 02.09.2008
--  Last Modification Date :
--
-- example : exec master..sp_ObjectSearch  'user'
-- ==========================================================================================
-- >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
-- ==========================================================================================
ALTER proc [dbo].[sp_ObjectSearch]
@object varchar(max)
as
declare dblist cursor for select name from sys.databases; 
create table #result (DatabaseName varchar(256),TypeName varchar(256),ObjectName varchar(256))
declare @dbname varchar(max),
@cmd varchar(max)
open dblist
fetch next from dblist into @dbname
while (@@fetch_status=0)
begin 
select @cmd='if exists (select * from ['+@dbname+'].sys.objects where name like ''%'+@object+'%'' )
begin
insert #result
select  '''+upper(@dbname)+''' as [Database],
case type
when ''AF'' Then ''Aggregate function (CLR)''
when ''C'' Then ''CHECK constraint''
when ''D'' Then ''DEFAULT (constraint or stand-alone)''
when ''F'' Then ''FOREIGN KEY constraint''
when ''PK'' Then ''PRIMARY KEY constraint''
when ''P'' Then ''SQL stored procedure''
when ''PC'' Then ''Assembly (CLR) stored procedure''
when ''FN'' Then ''SQL scalar function''
when ''FS'' Then ''Assembly (CLR) scalar function''
when ''FT'' Then ''Assembly (CLR) table-valued function''
when ''R'' Then ''Rule (old-style, stand-alone)''
when ''RF'' Then ''Replication-filter-procedure''
when ''SN'' Then ''Synonym''
when ''SQ'' Then ''Service queue''
when ''TA'' Then ''Assembly (CLR) DML trigger''
when ''TR'' Then ''SQL DML trigger''
when ''IF'' Then ''SQL inlined table-valued function''
when ''TF'' Then ''SQL table-valued-function''
when ''U'' Then ''Table (user-defined)''
when ''UQ'' Then ''UNIQUE constraint''
when ''V'' Then ''View''
when ''X'' Then ''Extended stored procedure''
when ''IT'' Then ''Internal table''
end As Type
,Name as [Object Name] from ['+@dbname+'].sys.objects 
where name like ''%'+@object+'%''
end '


exec (@cmd)
fetch next from dblist into @dbname
end 
close dblist
deallocate dblist
select * from #result order by DatabaseName, TypeName, ObjectName
drop table #result

DB2 database and SQL limits

DB2 database and SQL limits. This information is collected from a book on DB2 database
Description	Limit
Maximum combined length for INT, SMALLINT, CHAR, DECIMAL, DATE, TIME, and TIMESTAMP columns in a single record	32767 bytes
Maximum length of a BLOB column	2 Gigabytes -1 byte
Maximum length of a CHAR column	32767 bytes
Maximum length of a SQL statement	64 kilobytes
Maximum length of a VARCHAR column	32767 bytes
Maximum length of a check constraints	32767 bytes
Maximum length of a default value	32767 bytes
Maximum length of a row in a table	64 kilobytes
Maximum length of each column in a single index	1024 bytes
Maximum number of columns in a foreign key	8
Maximum number of columns in an index	8
Maximum number of columns in a primary key	8
Maximum number of columns in a table	256
Maximum number of indices in a table	15
Maximum number of LOB locators	256
Maximum number of rows in a table	Limited by table size
Maximum number of statement handles per connection	256
Maximum number of tables in a data store	65535
Maximum size of a decimal	31 digits
Maximum size of a literal	32672 bytes
Maximum size of a table (on a 32 bit system)	2 Gigabytes
Maximum year for a date value	9999
Minimum year for a date value	0001