Saturday, September 28, 2013

Create Database Link to DB on Amazon EC2 Instance

From a database, we can create a database link to another remote database such as one on Amazon EC2 virtual server as shown below. Here is the amazon EC2 Linux instance's Public DNS.

SQL> create database link dl_aws_ec2 connect to prod_DB identified by PWDXXX using '(description=(address=(protocol= TCP)( (connect_data=(sid=XE)))';
Database link created.

SQL> select count(1) from user_tables@dl_aws_ec2;


Just like we query any databases, we can see a few tables with names starting with the word "DEMO", count the number of records, and if we want, make a local copy of the tables.

SQL> select table_name from user_tables@dl_aws_ec2 where table_name like 'DEMO%' and rownum <5 order by table_name;


SQL> select count(*) from DEMO_CUSTOMERS@dl_aws_ec2;


SQL> create table DEMO_CUSTOMERS_LOCAL as select * from DEMO_CUSTOMERS@dl_aws_ec2;
Table created.

1 comment:

meghanasmiley03 said...

I admire the valuable information you offer in your articles. I will bookmark your blog and have my friends check up here often. I am quite sure they will learn lots of new stuff here than anybody else! Regards aws jobs in hyderabad.