We help IT Professionals succeed at work.
Get Started

Oracle SQL queries -- Challenging question

sam_2012
sam_2012 asked
on
491 Views
Last Modified: 2016-10-02
Hi Team,

I have an requirement , I need to write an ETL tool using Oracle SQL and PLSQL for applying transformation and then loading into the target tables. The data is already loaded in the staging tables , I need to come with the performance oriented code to do the transformation. I have around 15 lakh records in my staging table.

Iam planning two approach for this ,
1. Using normal SQL statements to apply the transformation and use temporary tables to store the data and then load into the target tables.
2. Use PLSQL collections to process 1000 records at a time and use bulk insert into temporary tables and then load them into target tables.

In both the cases i need to mutilple tables to fetch data and then apply the transformation. The transformation can be applied by looking into some lookup tables or direct formating of the data.

I want to know which method is best for this requirement.

Any help is really appreciated.
Comment
Watch Question
Database Developer & Administrator
CERTIFIED EXPERT
Most Valuable Expert 2011
Top Expert 2012
Commented:
This problem has been solved!
Unlock 1 Answer and 13 Comments.
See Answer
Why Experts Exchange?

Experts Exchange always has the answer, or at the least points me in the correct direction! It is like having another employee that is extremely experienced.

Jim Murphy
Programmer at Smart IT Solutions

When asked, what has been your best career decision?

Deciding to stick with EE.

Mohamed Asif
Technical Department Head

Being involved with EE helped me to grow personally and professionally.

Carl Webster
CTP, Sr Infrastructure Consultant
Ask ANY Question

Connect with Certified Experts to gain insight and support on specific technology challenges including:

  • Troubleshooting
  • Research
  • Professional Opinions
Did You Know?

We've partnered with two important charities to provide clean water and computer science education to those who need it most. READ MORE