PostGre SQL Installation steps Windows

Download software from below URL

http://www.enterprisedb.com/products-services-training/pgdownload#windows

Follow the below steps to install Postgre

After the installation, you see the folders as follows

Connecting to the postgre database

Export Oracle table into Excel Using SQLPlus Spool command

The following code exports data from dba_tables table into .CSV file

After the table export into .CSV file, if we open the file with Excel we can see each table column data into separate columns in excel.

set term off
set echo off
set underline off
set colsep ,
set linesize 100
set pagesize 0
set lines 1000 pages 1000
set trimspool on
set feedback off
set heading on
set newpage 0
set headsep off

spool h:\tmp\table_export_into_file.csv
-- Exporing the table dba_tables into csv file
select owner, table_name, tablespace_name
from dba_tables
where rownum <=10;

spool off

Output looks like as follows

Netezza JDBC Program

Netezza JDBC Program

Steps to connect to Netezza Database using Java (JDBC) program

Download the Netezza driver nzjdbc.jar

Connect to Eclipse and upload the nzjdbc.jar using "Build Path" as shown in below images

Java Class to connect to Netezza Database and read table data

---------------------------------------------------
package sample;

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;

public class JdbcNetezzaConnection {

    public static void main(String[] args) {

        Connection conn1 = null;
        Statement statement = null;

        try {
            Class.forName("org.netezza.Driver");
            conn1 = DriverManager.getConnection("jdbc:netezza://servername/databasename", "username","password");
            if (conn1 != null) {
                System.out.println("Connected with connection #1");
            }
         // Create the statement to be used to get the results.
            statement = conn1.createStatement();
            // Create a query to use.
            String query = "select tablename, owner from _v_table where owner = 'ADMIN' limit 10";
            ResultSet resultSet = statement.executeQuery(query);

            System.out.println("Printing result...");
            while (resultSet.next()) {
             String tn = resultSet.getString("tablename");
             String opg = resultSet.getString("owner");
             System.out.println("\tablename: " + tn + ",  owner: " + opg );
         }

        } catch (ClassNotFoundException ex) {
            ex.printStackTrace();
        } catch (SQLException ex) {
            ex.printStackTrace();
        } finally {
            try {
                if (conn1 != null && !conn1.isClosed()) {
                    conn1.close();
                }
            } catch (SQLException ex) {
                ex.printStackTrace();
            }
        }
    }
}

----------------------------------------------------

Output of the above class

Output from Netezza Database

Redshift JDBC Program

Redshift JDBC Program

Steps to connect Redshift database using Java JDBC program

Download the driver from

http://docs.aws.amazon.com/redshift/latest/mgmt/configure-jdbc-connection.html

JDBC 4.1–compatible driver: https://s3.amazonaws.com/redshift-downloads/drivers/RedshiftJDBC41-1.1.10.1010.jar

The class name for this driver is com.amazon.redshift.jdbc41.Driver.

Connect to Eclipse, upload the Redshift JDBC driver using "Build Path" -> Add External Archieves  as shown like in below images

The following is the Java class to read data from Redshift table

-----------------------------------------------------------

package sample;

import java.sql.Connection;

import java.sql.DriverManager;

import java.sql.ResultSet;

import java.sql.SQLException;

import java.sql.Statement;

public class JdbcRedshiftConnection {

    public static void main(String[] args) {

        Connection conn1 = null;

        Statement statement = null;

        try {

            Class.forName("com.amazon.redshift.jdbc41.Driver");

            conn1 = DriverManager.getConnection("jdbc:redshift://servername:port/databasename", "username","password");

            if (conn1 != null) {

                System.out.println("Connected with connection #1");

            }

         // Create the statement to be used to get the results.

            statement = conn1.createStatement();

            // Create a query to use.

            String query = "select schemaname,  tablename from  pg_table_def  limit 10";

            ResultSet resultSet = statement.executeQuery(query);

            System.out.println("Printing result...");

            while (resultSet.next()) {

             String tn = resultSet.getString("schemaname");

             String opg = resultSet.getString("tablename");

             System.out.println("\t schemaname: " + tn + ",  tablename: " + opg );

         }

        } catch (ClassNotFoundException ex) {

            ex.printStackTrace();

        } catch (SQLException ex) {

            ex.printStackTrace();

        } finally {

            try {

                if (conn1 != null && !conn1.isClosed()) {

                    conn1.close();

                }

            } catch (SQLException ex) {

                ex.printStackTrace();

            }

        }

    }

}

------------------------------------------------------------

Sample output from the above Java Class

Sample output from Redshift Database

Oracle JDBC Program

Oracle JDBC Program

Steps to connect to Oracle Database using Java (JDBC)

Download the Oracle JDBC driver ojdbc6.jar  from

http://www.oracle.com/technetwork/database/enterprise-edition/jdbc-112010-090769.html

Go to eclipse and

Choose “ojdbc6.jar” and upload the file using above.

Create a java class as follows

-------------------------------------------------

package sample;

import java.sql.Connection;

import java.sql.DriverManager;

import java.sql.ResultSet;

import java.sql.SQLException;

import java.sql.Statement;

public class JdbcOracleConnection {

    public static void main(String[] args) {

        Connection conn1 = null;

        Statement statement = null;

        try {

            Class.forName("oracle.jdbc.OracleDriver");

           String dbURL1 = "jdbc:oracle:thin:username/password@localhost:1521:XE";

            conn1 = DriverManager.getConnection(dbURL1);

            if (conn1 != null) {

                System.out.println("Connected with connection #1");

            }

            statement = conn1.createStatement();

            // Create a query to use.

            String query = "select table_name, owner  from dba_tables where rownum <=10";

            ResultSet resultSet = statement.executeQuery(query);

            System.out.println("Printing result...");

            while (resultSet.next()) {

             String tn = resultSet.getString("table_name");

             String opg = resultSet.getString("owner");

             System.out.println("\ttable_name: " + tn +",  owner: " + opg );

         }

        } catch (ClassNotFoundException ex) {

            ex.printStackTrace();

        } catch (SQLException ex) {

            ex.printStackTrace();

        } finally {

            try {

                if (conn1 != null && !conn1.isClosed()) {

                    conn1.close();

                }

            } catch (SQLException ex) {

                ex.printStackTrace();

            }

        }

    }

}

-----------------------------------------------------

The sample output of class JdbcOracleConnection is as follows

Toad substitution variables window

To disable the substitution variables window in Toad
go to View -> Toad Options -> Editor -> Execute/Compile -> Substitution Variable Prompting -> Set to None

Efficient Function Calls from SQL By Tim

Tim explained the user defined function calls from SQL very well. Refer here for those videos -> Function Calls from SQL